June 2, 2006



Mr. Larry M. Spirgel
Assistant Director
Securities and Exchange Commission
450 Fifth Street, N.W.
Washington, D.C.  20549-0306

         Re:      Cablevision Systems Corporation
                  CSC Holdings, Inc.
                  Form 10-K for Fiscal Year Ended December 31, 2005
                  Filed March 2, 2006

                  Form 10-Q for the Fiscal Quarter Ended March 31, 2006
                  File Nos. 1-14764 and 1-09046

Dear Mr. Spirgel:

         This letter responds to the comment letter (the "Comment  Letter") from
the Staff of the Securities and Exchange  Commission (the  "Commission"),  dated
May 19,  2006,  concerning  the Annual  Report on Form 10-K for the fiscal  year
ended December 31, 2005 (the "Form 10-K") of Cablevision Systems Corporation and
CSC Holdings,  Inc.  (collectively,  the "Company") and the Company's  Quarterly
Report on Form 10-Q for the  fiscal  quarter  ended  March 31,  2006 (the  "Form
10-Q").

         To  facilitate  the Staff's  review,  the Company has  included in this
letter the  captions  and  numbered  comments in bold text and has  provided the
Company's responses immediately following each numbered comment.

         In  some  of the  responses,  the  Company  has  agreed  to  change  or
supplement the disclosures in future filings in light of the Staff's views.  The
Company  continues  to believe its prior  filings are  accurate in all  material
respects and are in compliance with applicable  disclosure rules and regulations
promulgated by the Commission and U.S. generally accepted accounting principles.
Accordingly, any changes implemented in future

                                       1


filings  should  not be  taken  as an  admission  that  prior  disclosures  were
deficient or inaccurate.

The following are the Company's responses to the Comment Letter:

FORM 10-K FOR FISCAL YEAR ENDED DECEMBER 31, 2005
- -------------------------------------------------

Selected Financial Data, pages 43 and 45
- ----------------------------------------

1.   PLEASE REFER TO FOOTNOTE  (3).  TELL US AND DISCLOSE WHY YOU ARE  EXCLUDING
     THE REVENUES OF LIGHTPATH FOR THE FOURTH QUARTER IN THE PERIOD.

     Company  Response  -- The  Company's  Telecommunications  Services  segment
     generates revenue principally from (1) its cable system's video, high-speed
     data,  and Voice over  Internet  Protocol  ("VoIP")  services  and (2) from
     Lightpath,  its  competitive  local  exchange  carrier  providing  switched
     services,   private  line  and  advanced  networking  features,   including
     broadband access  primarily to medium and large  commercial  organizations.
     The purpose of the  "average  monthly  revenue per basic video  subscriber"
     measure is to demonstrate the revenues generated per basic video subscriber
     by the cable system's video, high-speed data and VoIP services. Revenues of
     Lightpath are excluded from this measure because the sources of revenue are
     unrelated to the cable system's subscribers.

     Footnote 3 defines how the Company calculates  "Average monthly revenue per
     basic VIDEO subscriber." Average monthly revenue per basic video subscriber
     represents the following:

     a.   Numerator - Total revenue  generated from subscribers of the Company's
          cable systems for the fourth quarter of each fiscal year presented for
          the Telecommunications  Services segment less the revenue attributable
          to our Lightpath operations divided by
     b.   Denominator - The average  number of basic video  subscribers  for the
          fourth    quarter   of   each   fiscal   year    presented   for   the
          Telecommunications Services segment's cable systems.

     Accordingly,  both the numerator and  denominator  exclude any revenues and
     subscribers, respectively, related to the Company's Lightpath operations.

     The Company  believes the footnote could have been written more clearly and
     the Company will modify it to read as follows in prospective filings:


                                       2


     "Average  monthly  revenue  per basic video  subscriber  is  calculated  by
     dividing the GAAP  revenues for the  Telecommunications  Services  segment,
     less the revenue attributable to Lightpath, for the fourth quarter for each
     year  presented by the average  monthly  number of basic video  subscribers
     served by the Company's cable systems for the same period.  For purposes of
     this   calculation,   both  revenue  and  average  number  of  basic  video
     subscribers exclude the Company's Lightpath operations."

Consolidated Statements of Cash Flows, page I-8
- -----------------------------------------------

2.   PLEASE PRESENT YOUR PROVISION FOR DOUBTFUL ACCOUNTS AS AN ADJUSTMENT TO NET
     CASH PROVIDED BY OPERATING ACTIVITIES.

     Company  Response -- The Company has  historically  presented the provision
     for doubtful  accounts  within the "Accounts  receivable,  trade" line item
     within the operating section of the consolidated statements of cash flows.

     In acknowledgement of the Staff's request,  the Company will present in its
     future filings the provision for doubtful  accounts as a separate line item
     adjustment   to  net  cash  provided  by  operating   activities   and  for
     comparability  will  reclassify  in its future  filings the  provision  for
     doubtful  accounts  from the  accounts  receivable  trade line item for all
     prior periods.

Note 8.  Intangible Assets, page I-31
- -------------------------------------

3.   PLEASE TELL US THE FACTORS YOU CONSIDERED IN  DETERMINING  THAT YOUR SPORTS
     FRANCHISES ARE INDEFINITE-LIVED INTANGIBLE ASSETS UNDER PARAGRAPH 11 OF FAS
     142.

     Company Response -- Madison Square Garden, L.P. ("MSG"), an indirect wholly
     owned  subsidiary of the Company,  owns the New York Knicks  ("Knicks") and
     New York Rangers ("Rangers") franchises through its membership interests in
     the National  Basketball  Association  ("NBA") and National  Hockey  League
     ("NHL"), respectively. Each of these franchises are only one of thirty that
     operate within each league.  In determining  that the Company's NBA and NHL
     sports  franchises  are  indefinite-lived  intangible  assets,  the Company
     considered all pertinent factors,  including the following,  as required by
     paragraph 11 of Financial Accounting Standards Board ("FASB") Statement No.
     142, Goodwill and Other Intangible Assets.


                                       3



     a.   The expected use of the asset by the entity
          -------------------------------------------

          The  Company's  MSG  subsidiary  operates a sports  and  entertainment
          business,  which owns and operates professional sports teams, regional
          cable  television  networks,  event  facilities  and an  entertainment
          business.  The Company  anticipates  exploiting the sports  franchises
          indefinitely  by continuing to generate  positive cash flow from MSG's
          operations,  which primarily include showcasing the Knicks and Rangers
          franchises  through live  presentations  that  generate  ticket sales,
          suite revenues,  food and merchandise revenues along with the revenues
          earned by MSG's sports networks,  whose primary  programming  includes
          the  presentation  of the Knicks and  Rangers  games  along with other
          professional sports teams not owned by the Company.

     b.   The  expected  useful  life of  another  asset or a group of assets to
          which the useful life of the intangible asset may relate
          ----------------------------------------------------------------------

          The  presentation  of Knicks and Rangers home games takes place at the
          Madison  Square  Garden  Arena,  and the broadcast of each team's home
          games and the sale of food and  merchandise  at these  home  games are
          accomplished with the use of other assets owned by the Company.  These
          assets  include  certain  tangible  and  intangible  assets  that  are
          depreciated or amortized over their respective estimated useful lives,
          which  range from 2 to 30 years.  The  Company  expects to replace its
          tangible  assets at the end of their  useful lives with new assets and
          renew the agreements  associated with certain of its intangibles  such
          as  affiliate  agreements  and  relationships  which will  continue to
          support  the   operations   of  the  Company's   professional   sports
          franchises.  The  Company  respectfully  advises  the  Staff  that its
          continued  ownership  and  operation  of its Knicks and  Rangers  team
          operations is not  dependent on its continued  ownership and operation
          of the Madison Square Garden Arena as the Company  believes the Knicks
          and  Rangers  games  could  be  played  in an  alternative  venue,  if
          necessary.

     c.   Any legal,  regulatory,  or contractual  provisions that may limit the
          useful life
          ----------------------------------------------------------------------

          The  Company  is not aware of any  legal,  regulatory  or  contractual
          provisions that the Company  believes could  reasonably be expected to
          limit the indefinite useful lives of its NBA or NHL franchises.


                                       4


     d.   Any legal,  regulatory,  or contractual provisions that enable renewal
          or  extension  of  the  asset's  legal  or  contractual  life  without
          substantial  cost  (provided  there is evidence to support  renewal or
          extension  and  renewal  or  extension  can  be  accomplished  without
          material modifications of the existing terms and conditions)
          ----------------------------------------------------------------------

          As  mentioned  under  "a"  above,  MSG owns  the  Knicks  and  Rangers
          franchises  through its  membership  interests  in each of the NBA and
          NHL. The NBA and NHL are unincorporated  associations each governed by
          a written  Constitution,  which is  expressly  described as a contract
          among the members. The New York Knicks and New York Rangers franchises
          have  been  in   existence   for   approximately   60  and  80  years,
          respectively.

          There is no cost or  process  required  for  "renewal"  of the  league
          memberships -- they are perpetual except as described below:

          o    Membership  interests in the NBA and NHL are perpetual unless and
               until  transferred by the owner or terminated after a hearing and
               a finding by a three  quarters  vote of the  respective  leagues'
               Board of  Governors  that the  member  has been  guilty  of gross
               violations of rules and agreements,  failure to pay dues, failure
               to  play  games,  gambling,   game-fixing,   or  similar  serious
               misconduct.

          o    Under  the  respective   Constitutions,   either  league  may  be
               dissolved by its members -- by a three quarters vote of the Board
               of Governors  in the NBA and by a unanimous  vote of the Board of
               Governors in the NHL. No such action is anticipated.

          The  Company is not aware of any  legal,  regulatory,  or  contractual
          provisions that the Company  believes could  reasonably be expected to
          limit the indefinite useful life of its NBA or NHL franchises.

     e.   The effects of obsolescence,  demand, competition,  and other economic
          factors (such as the stability of the  industry,  known  technological
          advances,  legislative action that results in an uncertain or changing
          regulatory environment, and expected changes in distribution channels)
          ----------------------------------------------------------------------

          In the  Company's  opinion,  the strength of the two leagues in ticket
          revenue per game is at a very high historical level and further growth
          is expected.


                                       5


          The Company believes that the strength in attendance and ticket prices
          along with increases in broadcast revenue,  concession revenue, luxury
          boxes and other related revenues together with the stability  provided
          by the current NBA and NHL collective  bargaining  agreements continue
          to support the positive long-term financial health of each league. The
          Company is not aware of any  technological  advances,  legislative  or
          regulatory  actions,  or changes in  distribution  channels that could
          significantly impact the teams' operations.

          Lastly,  franchises  in the NBA and NHL that have not  performed  well
          have been  allowed to move to different  cities with league  approval.
          The  Company  is not aware of any NBA or NHL  franchise  that has been
          terminated in the last 30-40 years.

     f.   The level of maintenance  expenditures required to obtain the expected
          future  cash flows from the asset (for  example,  a material  level of
          required  maintenance in relation to the carrying  amount of the asset
          may suggest a very limited useful life)
          ----------------------------------------------------------------------

          Other than normal operating and capital expenditures, no unusual level
          of expenditures  are anticipated that could  significantly  impact the
          Company's long-term view of the prospects of owning these two valuable
          sports franchises.

     Overall Conclusion:
     -------------------

     The   Company  is  not  aware  of  any  legal,   regulatory,   contractual,
     competitive,  economic,  or other  provisions  or factors known or expected
     that the Company  believes could reasonably be expected to limit the useful
     life of the Company's NBA and NHL franchises  which have been classified as
     intangible assets with indefinite lives.


Note 17.  Contractual Obligations, page I-56
- --------------------------------------------

4.   PLEASE TELL US HOW YOU ARE ACCOUNTING FOR THE PUT AND CALL OPTIONS. INCLUDE
     IN YOUR RESPONSE REFERENCES TO THE APPROPRIATE ACCOUNTING LITERATURE.

     Company Response -- In April 2005 Rainbow Programming  Holdings ("RPH"), an
     indirect  wholly owned  subsidiary of the Company,  and Rainbow HD Holdings
     LLC ("VOOM")  entered into an  investment  agreement  with a subsidiary  of
     EchoStar  Communications  Corporation  ("EchoStar"),  a satellite delivered
     digital  television  operator,  pursuant  to which  after  the  closing  in
     November 2005, EchoStar owns a


                                       6


     20%  membership  interest in VOOM and RPH owns the other 80%. The agreement
     provides that on the fifth or eighth  anniversary  of the effective date of
     the agreement,  on the  termination of a related  affiliation  agreement by
     EchoStar,  or based on other specific  events,  EchoStar has a put right to
     require RPH to purchase all of its equity securities in VOOM at fair value.
     On the seventh or tenth  anniversary  of the effective  date, or the second
     anniversary  date  of the  termination  of  the  affiliation  agreement  by
     EchoStar,  RPH has a call right to purchase all of EchoStar's  ownership in
     VOOM at fair value.  The purchase price under the put or call is payable in
     cash,  registered Class A Common Stock of the Company or promissory  notes,
     at the option of the Company.

     The  Company  disclosed  the put and  call  rights  in Note 17 but does not
     provide accounting recognition for the put and call rights since the rights
     provide for an acquisition by RPH of the EchoStar member  interest,  in the
     future,  at fair value, to be determined at the time of such purchase.  The
     Company believes the put and call rights have zero fair value in accordance
     with generally accepted valuation methodologies.

     Even if the put and call rights were deemed to be (1) derivative  financial
     instruments  that would have to be  bifurcated  from the host contract (the
     VOOM Limited Liability  Company  Agreement) and,  therefore,  accounted for
     separately  in  accordance  with FASB  Statement  No. 133,  Accounting  for
     Derivative  Instruments  and Hedging  Activities (as amended),  or (2) free
     standing  financial  instruments in accordance with FASB Statement No. 150,
     Accounting for Certain Financial  Instruments with  Characteristics of both
     Liabilities and Equity,  the instruments  would be valued at zero since the
     put and call rights  require the  EchoStar  20% interest to be purchased at
     fair  value to be  determined  at the time of such  purchase.  Accordingly,
     there would be no  resulting  accounting  impact  because the fair value of
     such put and call rights would always be zero.

Note 20.  Segment Information, page I-61
- ----------------------------------------

5.   PLEASE  DELETE   "UNAUDITED"  FROM  "ADJUSTED   OPERATING  CASH  FLOW  FROM
     CONTINUING OPERATIONS."

     Company Response -- In acknowledgement of the Staff's request,  the Company
     will  delete  "unaudited"  from the  "Adjusted  operating  cash  flow  from
     continuing  operations"  section  in the  segment  footnote  disclosure  in
     prospective filings.


                                       7


Note 22.  Other Matters, page I-66
- ----------------------------------

6.   PLEASE REFER TO THE LITIGATION  SETTLEMENT WITH TIME WARNER  ENTERTAINMENT,
     L.P.  PROVIDE US WITH SPECIFIC DETAILS OF THE SETTLEMENT  AGREEMENT.  ALSO,
     TELL US WHY IT IS  APPROPRIATE  TO  CAPITALIZE  THE $74 MILLION  SETTLEMENT
     PAYMENT AND AMORTIZE IT OVER THE REMAINING 13 YEAR LIFE OF THE EXTENDED AMC
     AGREEMENT.   INCLUDE  IN  YOUR  RESPONSE   REFERENCES  TO  THE  APPROPRIATE
     ACCOUNTING LITERATURE.

     Company Response -- The specific  details of the settlement  agreement with
     Time Warner Entertainment  Company, L.P. ("TWE") and Time Warner Cable Inc.
     ("TWC")  (the  material  terms  of which  have  been  previously  disclosed
     beginning with the Company's  September 30, 2005 Form 10-Q filing) provided
     for:

          (a)  Cash payments  totaling $74 million  (comprised of $5 million for
               TWE's costs and attorneys' fees in connection with the litigation
               among the  parties  payable  in 2005 and $69  million  payable in
               three equal installments in 2005, 2006 and 2007),

          (b)  Dismissal  of the  pending  litigation  between  TWE and AMC upon
               payment of the first  installment  of the $69  million and the $5
               million for TWE's costs and attorneys' fees,

          (c)  Comprehensive  mutual  releases  of all  claims  by and among the
               parties to the  settlement  agreement  (TWE,  TWC,  Rainbow Media
               Holdings, LLC ("RMH"), an indirect wholly owned subsidiary of the
               Company,  and AMC, an indirect  wholly owned  subsidiary of RMH),
               and

          (d)  The  simultaneous  execution  by AMC and TWC of an  amendment  to
               their   existing   affiliation   ("carriage")   agreement.   This
               amendment,  among other things, extended the affiliation contract
               term from  December  31, 2008 to  December  31,  2018,  a 10-year
               extension,  or  approximately a 13-year  carriage period from the
               date of settlement.

     Concurrent with the  negotiation and execution of the settlement  agreement
     between  TWE/TWC  and  RMH/AMC  and the  related  amended  AMC  affiliation
     agreement,  various  other  subsidiaries  of  the  Company  negotiated  and
     executed new  affiliation  agreements  and  amendments to several  existing
     affiliation agreements with TWC.

     Although  Emerging  Issues Task Force  ("EITF")  Issue No.  00-21,  Revenue
     Arrangements with Multiple  Deliverables ("EITF 00-21") is not specifically
     applicable


                                       8


     to the contractual  arrangements set forth above as the arrangements relate
     to both revenue and expense  elements,  the Company believes that the broad
     allocation  principles  included  in EITF  00-21  are the most  appropriate
     accounting  guidance by  analogy.  EITF 00-21 is intended to address how to
     allocate fees in arrangements with multiple revenue-generating  activities.
     The Company  believes that EITF 00-21's  broad  allocation  principles  are
     applicable  to  other  "multiple   element   arrangements"   since  several
     agreements  were entered into at the same time and the  presumption is that
     the contracts were negotiated as one agreement with multiple elements.

     The Company determined the fair values associated with each of the discrete
     elements  of the  arrangements  entered  into among TWE,  TWC,  and various
     subsidiaries  of the  Company,  including  the  settlement  agreement,  the
     amended  AMC  affiliation  agreement  and  the  various  other  affiliation
     agreements,  some of which were  significantly  modified in connection with
     the contemporaneous  negotiation and execution of the settlement agreement.
     Certain of these modifications had a negative economic impact on individual
     subsidiaries  of the  Company  other  than AMC,  effectively  resulting  in
     additional   consideration  being  paid  to  TWE/TWC  related  to  the  AMC
     settlement and affiliation agreement extension. For example, in the case of
     one affiliation agreement, the Company agreed to concessions to an existing
     contract as part of this overall settlement. The Company's view was that on
     a stand-alone  basis (absent the settlement  agreement and AMC  affiliation
     agreement  extension) such concessions would not have been agreed to before
     the  next  contract  renewal  date.  All  such  modifications  resulted  in
     additional net arrangement  consideration to TWC totaling  approximately $9
     million[1].

     The  total  arrangement  consideration  of  approximately  $83  million  is
     comprised  of  the  total  cash   consideration  of  $74  million  and  the
     approximate $9 million of additional net arrangement consideration. The $74
     million  of cash  consideration  includes  $5 million  for TWE's  costs and
     attorneys'  fees. In  accordance  with the EITF's broad  principles  around
     income  statement  characterization,  as  discussed  in paragraph 9 of EITF
     Issue  No.  01-9,  Accounting  for  Consideration  Given by a  Vendor  to a
     Customer (Including a Reseller of the Vendor's Products) ("EITF 01-9"), the
     Company  aggregated  the $5 million  payment for TWE's costs and attorneys'
     fees with the $69  million in the  determination  of the total  arrangement
     consideration.  Since  TWE was not  required  to and  did not  provide  any
     supporting   documentation   for  such  costs  and   attorneys'   fees,  no
     identifiable   benefit  could  be  separated  from  the  total  arrangement
     consideration.  The total  arrangement  consideration was then allocated to
     settlement  damages and AMC deferred carriage fees

- --------
[1] The  offsetting  effect of the $9  million  of  additional  net  arrangement
consideration  was principally  recognized as deferred  credits by certain other
affected subsidiaries of the Company and will be amortized into the consolidated
statement of  operations  over the  remaining  lives of the  respective  amended
affiliation  agreements,  which will  result in amounts  that  approximate  fair
value.

                                       9


     based on their  estimated  relative  fair values as  described  in the next
     paragraph. The Company's accounting policy regarding deferred carriage fees
     is disclosed in Note 1 of the Company's December 31, 2005 Form 10-K on page
     I-13.

     The Company  prepared the  following  two-step  analysis to  ascertain  the
     portion of the total arrangement  consideration paid to TWC that related to
     settlement  of the AMC  litigation  matter and the  deferred  carriage  fee
     associated   with  the  amended  AMC  affiliation   agreement   (which  was
     contemporaneously executed in connection with the settlement):
          1.   The total fair value of the  settlement  damages  was  determined
               based on an analysis of the excess of the historical TWC rate for
               carriage of AMC (from TWE's  alleged  date of AMC's breach of the
               AMC affiliation agreement (May 2002) through the settlement date)
               over  comparable  historical  rates paid by other AMC  affiliates
               (customers)  and the total  fair value of the  deferred  carriage
               fees was  determined  based on an  analysis  of the excess of the
               rates that TWC agreed to pay to carry AMC  through the end of the
               10-year extension period over comparable carriage rates for other
               AMC affiliates.
          2.   The total arrangement  consideration of approximately $83 million
               was  then  allocated  to  the  settlement  damages  and  deferred
               carriage fee based on their estimated relative fair values as set
               forth in step one above,  resulting in  approximately  $2 million
               being  identified as  settlement  damages and  approximately  $81
               million  being  identified  as deferred  AMC  carriage  fees (the
               primary  component of deferred  carriage fees which was disclosed
               in the Operating  Activities  section of the Cash Flow discussion
               of  Management's  Discussion  and  Analysis  on  page  87 of  the
               Company's December 31, 2005 Form 10-K).

     In  accordance  with Issue 1 of EITF 01-9,  the deferred  carriage fees are
     being  amortized as a reduction of revenue over the  remaining  life of the
     amended AMC  affiliation  agreement of  approximately  13 years (October 1,
     2005 through  December 31, 2018). As a result,  the future  contractual TWC
     net effective rates result in rates that are more reasonable in relation to
     fair value as indicated by other future contractual net effective rates for
     other AMC affiliates.


                            *   *   *   *   *   *

                                       10


          In responding to the Staff's comments, the Company acknowledges that:

          o    the Company is  responsible  for the adequacy and accuracy of the
               disclosure in its filings;

          o    Staff  comments  or changes to  disclosure  in  response to Staff
               comments do not foreclose the  Commission  from taking any action
               with respect to the Company's filings; and

          o    the  Company  may not assert  Staff  comments as a defense in any
               proceeding  initiated by the  Commission  or any person under the
               federal securities laws of the United States.

         If you have any questions or comments regarding the enclosed materials,
please call the undersigned at (516) 803-1450.


                                          Very truly yours,


                                          /s/ Wm. Keith Harper


                                          Wm. Keith Harper
                                          Senior Vice President, Controller
                                          and Principal Accounting Officer

cc:  Kyle Moffatt
     Dean Suehiro
     Kathleen Krebs
     (Securities and Exchange Commission)

     Michael P. Huseby
     (Executive Vice President and Chief Financial Officer)

     Victoria D. Salhus
     (Senior Vice President, Deputy General Counsel and Secretary)


                                       11



     John P. Mead
     (Sullivan & Cromwell LLP)

     Rosemary A. DeVito
     (KPMG LLP)


                                       12