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                                                                      EXHIBIT 21


                     MONTHLY CERTIFICATEHOLDERS' STATEMENT

                           Discover Card Trust 1993 B

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                                  CREDIT CARD

                           PASS-THROUGH CERTIFICATES

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     Under the Pooling and Servicing Agreement dated as of Feb. 1, 1993 (the
"Agreement") by and among Greenwood Trust Company (the "Servicer"), Discover
Receivables Financing Group and Wilmington Trust Company, as Trustee ,the
Servicer is required to prepare certain information each month regarding current
distributions to Investor Certificateholders and the performance of the Trust
during the previous month. The information which is required to be prepared with
respect to the distribution of March 16, 1998, and with respect to the
performance of the Trust during the Due Period ended in February 28, 1998, is
set forth below. Certain of the information is presented on the basis of an
original principal amount of $1,000 per Class A Certificate. Certain other
information is presented based on the aggregate amounts for the Trust as a
whole.

     Information Regarding the Current Monthly Distribution (stated on the basis
of $1,000 original principal amount).

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1. The total amount of the distribution to Class A Certificateholders on March
   16, 1998, per $1,000 interest ................................ $ 0.000000000

2. The total amount of the distribution to Class B Certificateholders on March
   16, 1998, per $1,000 interest ................................ $ 0.000000000

3. The amount of the distribution set forth in paragraph 1 above in respect of
   interest on the Class A Certificates, per $1,000 interest .... $ 0.000000000

4. The amount of the distribution set forth in paragraph 2 above in respect of
   interest on the Class B Certificates, per $1,000 interest .... $ 0.000000000
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5. The amount of the distribution set forth in paragraph 1 above in respect of
   principal on the Class A Certificates, per $1,000 interest ... $  0.000000000

6. The amount of the distribution set forth in paragraph 2 above in respect of
   principal on the Class B Certificates, per $1,000 interest ... $  0.000000000


Information Regarding the Performance of the Trust.

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1. Collections of Receivables.

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  (a) The aggregate amount of Finance Charge Collections processed during the
      related Due Period ........................................ $ 4,828,219.98

  (b) The aggregate amount of Principal Collections processed during the related
      Due Period ................................................ $51,253,317.79

  (c) The aggregate amount of Finance Charge Collections processed during the
      related Due Period which was allocated in respect of the Investor
      Certificates .............................................. $ 3,753,941.03

  (d) The aggregate amount of Principal Collections processed during the related
      Due Period which was allocated in respect of the Investor
      Certificates .............................................. $39,849,454.58

  (e) The aggregate amount of Finance Charge Collections processed during the
      related Due Period which was allocated in respect of the Class A
      Certificates .............................................. $ 3,412,585.88

  (f) The aggregate amount of Principal Collections processed during the related
      Due Period which was allocated in respect of the Class A
      Certificates .............................................. $36,225,845.01

  (g) The aggregate amount of Finance Charge Collections processed during the
      related Due Period which was allocated in respect of the Class B
      Certificates .............................................. $   341,355.15

  (h) The aggregate amount of Principal Collections processed during the related
      Due Period which was allocated in respect of the Class B
      Certificates .............................................. $ 3,623,609.57

  (i) The aggregate amount of Finance Charge Collections processed during the
      related Due Period which was allocated in respect of the Seller
      Certificate ............................................... $ 1,074,278.95
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  (j) The aggregate amount of Principal Collections processed during the related
      Due Period which was allocated in respect of the Seller
      Certificate ............................................. $ 11,403,863.21


2. Principal Receivables in the Trust; Principal Funding Account.

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  (a) The aggregate amount of Principal Receivables in the Trust as of the end
      of the Due Period ended in February 28, 1998 (which reflects the Principal
      Receivables represented by the Seller Certificate and the Investor
      Certificates) ........................................... $ 318,488,990.30

  (b) The amount of Principal Receivables in the Trust represented by the Class
      A Certificates (the "Class A Interest") as of the Due Period Ended in
      February 28, 1998 ....................................... $ 230,000,000.00

  (c) The amount of Principal Receivables in the Trust represented by the Class
      B Certificates (the "Class B Interest") as of the Due Period Ended in
      February 28, 1998 ....................................... $  23,000,000.00

  (d) The Class A Interest and the Class B Interest set forth in paragraph 2(b)
      and 2(c) above as a percentage of the aggregate amount of Principal
      Receivables set forth in paragraph 2(a) above ..................... 79.44%

  (e) The Class A Interest set forth in paragraph 2(b) above as a percentage of
      the aggregate amount of Principal Receivables set forth in paragraph 2(a)
      above ............................................................. 72.22%

  (f) The Class B Interest set forth in paragraph 2(c) above as a percentage of
      the aggregate amount of Principal Receivables set forth in paragraph 2(a)
      above .............................................................. 7.22%

  (g) The Aggregate Invested Amount as of the end of the current Distribution
      Date .................................................... $253,000,000.00

  (h) The Invested Amount as of the end of the current Distribution Date with
      respect to the Class A Certificates ..................... $230,000,000.00

  (i) The Invested Amount as of the end of the current Distribution Date with
      respect to the Class B Certificates ..................... $  23,000,000.00

  (j) The total amount to be deposited into the Principal Funding Account
      in respect of Principal Collections on such Distribution  
      Date .................................................... $           0.00
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  (k) The amount of the deposit referred to in paragraph 2(j) which was
      allocated in respect of the Class A Certificates............ $        0.00

  (l) The amount of the deposit referred to in paragraph 2(j) into the Principal
      Funding Account on such Distribution Date which was allocated in respect
      of the Class B Certificates ................................ $        0.00

  (m) The total amount on deposit in the Principal Funding Account on such
      Distribution Date (after giving effect to the deposit referred to in
      paragraph 2(j) ............................................. $        0.00

  (n) The total amount on deposit in the Principal Funding Account on such
      Distribution Date for the benefit of the Class A Certificates (after
      giving effect to the deposit referred to in paragraph 2(k) . $        0.00

  (o) The total amount on deposit in the Principal Funding Account on such
      Distribution Date for the benefit of the Class B Certificates (after
      giving effect to the deposit referred to in paragraph 2(l) . $        0.00

  (p) The total amount of Investment Income since the last Distribution 
      Date ....................................................... $        0.00

  (q) The total amount of Investment Income since the last Distribution Date in
      respect of the Class A Certificates ........................ $        0.00

  (r) The total amount of Investment Income since the last Distribution Date in
      respect of the Class B Certificates ........................ $        0.00

  (s) The Deficit Accumulation Amount (after giving effect to the deposit
      referred in paragraph 2(j).................................. $        0.00


3. Interest Funding Account.

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  (a) The total amount to be deposited into the Interest Funding Account in
      respect of Certificate Interest on such Distribution Date
      ............................................................ $1,429,833.33

  (b) The amount of Certificate Interest to be deposited into the Interest
      Funding Account on such Distribution Date in respect of the Class A
      Certificates ............................................... $1,293,750.00
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  (c) The amount of Certificate Interest to be deposited into the Interest
      Funding Account on such Distribution Date in respect of the Class B
      Certificates ............................................... $  136,083.33

  (d) The total amount on deposit in the Interest Funding Account in respect of
      Certificate Interest on such Distribution Date (after giving effect to the
      deposit referred to in paragraph 3(a) .....................  $1,429,833.33

  (e) The total amount of Certificate Interest on deposit in the Interest
      Funding Account on such Distribution Date in respect of the Class A
      Certificates (after giving effect to the deposit referred to in paragraph
      3(b) ....................................................... $1,293,750.00

  (f) The total amount of Certificate Interest on deposit in the Interest
      Funding Account on such Distribution Date in respect of the Class B
      Certificates (after giving effect to the deposit referred to in paragraph
      3(c) ....................................................... $  136,083.33


4. Investor Charged-Off Amount.

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  (a) The aggregate amount of Receivables charged-off as uncollectible during
      the Due Period ended in February 28, 1998 allocable to the Investor
      Certificates (the "Investor Charged-Off Amount") ........... $1,248,813.65

  (b) The aggregate amount of Receivables charged-off as Uncollectible during
      the Due Period ended in February 28, 1998 allocable to the Class A
      Certificates (the "Class A Charged-Off Amount") ............ $1,135,255.93

  (c) The sum of (i) the aggregate amount of Receivables charged-off as
      uncollectible during the Due Period ended in February 28, 1998 allocable
      to the Class B Certificates and (ii) the sum of (a) the positive
      difference, if any, between the Class B Subordinated Payment and Class B
      Finance Charge Collections (less Class B Excess Servicing) and (b) the
      amount by which the Investor Interest for the Class B Certificates is
      reduced pursuant to subsection 4.03(c)(i)(C)(the "Class B Charged-Off
      Amount") ................................................... $1,074,387.69

  (d) The Cumulative Class A Charged-Off Amount on March 16, 1998  $        0.00

  (e) The Cumulative Class B Charged-Off Amount on March 16, 1998  $        0.00
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5. Investor losses; Reimbursement of Charge-Offs.

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  (a) The amount of Class A Investor Loss, as defined in Section 4.06(b) of
      the Agreement, during the Due Period ended in February
      28, 1998 .................................................... $       0.00

  (b) The amount of Class B Investor Loss, as defined in Section 4.06(b) of
      the Agreement, during the Due Period ended in February
      28, 1998 .................................................... $       0.00
 
  (c) The amount of Class A Investor Loss set forth in Paragraph 5(a) above,
      per $1,000 interest (which will have the effect of reducing, pro rata,
      the amount of each Class A Certificateholder's
      investment) ................................................. $0.000000000

  (d) The amount of Class B Investor Loss set forth in Paragraph 5(b) above,
      per $1,000 interest (which will have the effect of reducing, pro rata,
      the amount of each Class B Certificateholder's investment) .. $0.000000000

  (e) The total amount reimbursed to the Trust in the current month pursuant to
      Section 4.06(c) of the Agreement, if any, in respect of Class A Investor
      Losses in prior months ...................................... $       0.00

  (f) The total amount reimbursed to the Trust in the current month pursuant to
      Section 4.06(c) of the Agreement, if any, in respect of Class B Investor
      Losses in prior months ...................................... $       0.00

  (g) The amount set forth in paragraph 5(e) above, per $1,000 interest (which
      will have the effect of increasing, pro rata, the amount of each Class A
      Certificateholder's investment) ............................. $0.000000000

  (h) The amount set forth in paragraph 5(f) above, per $1,000 interest (which
      will have the effect of increasing, pro rata, the amount of each Class B
      Certificateholder's investment) ............................. $0.000000000

  (i) The aggregate amount of Class A Investor Losses in the Trust as of the end
      of the day on March 16, 1998 ................................ $       0.00

  (j) The aggregate amount of Class B Investor Losses in the Trust as of the end
      of the day on March 16, 1998 ................................ $       0.00
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  (k) The amount set forth in paragraph 5(i) above, per $1,000 interest (which
      will have had the effect of reducing, pro rata, the amount of Class A
      Certificateholder's investment) ......................... $   0.000000000

  (l) The amount set forth in paragraph 5(j) above, per $1,000 interest (which
      will have had the effect of reducing, pro rata, the amount of Class B
      Certificateholder's investment) ......................... $   0.000000000


6. Investor Servicing Fee.

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  (a) The amount of the Class A Monthly Servicing Fee payable by the Trust to
      the Servicer for the month of February 28, 1998 ......... $     383,317.79

  (b) The amount of the Class B Monthly Servicing Fee payable by the Trust to
      the Servicer for the month of February 28, 1998 ......... $      38,342.63


7. Available Subordinated Amount.

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  (a) The amount available to be applied pursuant to Sections 4.03(c)(i)(B)
      and (C) of the Agreement as of the end of the day on March
      16, 1998 ................................................ $ 23,000,000.00

  (b) The amount set forth in paragraph 7(a) above as a percentage of the Class
      A Interest ........................................................ 10.00%


8. Available Class B Credit Enhancement Amount.

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  (a) The amount available to be drawn under the Class B Credit Enhancement
      pursuant to Sections 4.03(c)(i)(G) and (H) of the Agreement as of the
      end of the day on March 16, 1998 ........................ $ 12,650,000.00

  (b) The amount set forth in paragraph 8(a) above as a percentage of the Class
      B Interest ........................................................ 55.00%
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9. The Pool Factor.

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      The Pool Factor represents the ratio of the amount of the Class A Invested
      amount as of the end of the day on March 16, 1998 to the amount of the
      Class A Invested Amount as of the Closing Date. The amount of a Class A
      Certificateholder's pro rata share of the Class A Invested Amount can be
      determined by multiplying the original denomination of the Class A
      Certificateholder's Certificate by the Pool Factor ............ 1.00000000

      The Pool Factor represents the ratio of the amount of the Class B Invested
      amount as of the end of the day on March 16, 1998 to the amount of the
      Class B Invested Amount as of the Closing Date. The amount of a Class B
      Certificateholder's pro rata share of the Class B Invested Amount can be
      determined by multiplying the original denomination of the Class B
      Certificateholder's Certificate by the Pool Factor ............ 1.00000000

10.   The aggregate outstanding balance of Receivables that were delinquent by
      30 to 59 days as of the close of business on the last day of the Due
      Period related to such Distribution Date .................. $ 6,700,856.23

11.   The aggregate outstanding balance of Receivables that were delinquent by
      60 days or more as of the close of business on the last day of the Due
      Period related to such Distribution Date .................. $10,472,526.26



                       Greenwood Trust Company as Servicer

                                          By: 
                                             -----------------------------------
                                             Title: Vice President, Director of
                                             Accounting and Treasurer
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                          MONTHLY SERVICER CERTIFICATE

                           DISCOVER CARD TRUST 1993 B
                           --------------------------

                                   CREDIT CARD

                            PASS-THROUGH CERTIFICATES
                           --------------------------




   The undersigned, a duly authorized representative of Greenwood Trust Company
("Greenwood"), as Servicer pursuant to the Pooling and Servicing Agreement
dated as of Feb. 1, 1993 (the "Pooling and Servicing Agreement") by and among
Greenwood, Discover Receivables Financing Group Inc and Wilmington Trust 
Company, does hereby certify as follows:


1. Greenwood is Servicer under the Pooling and Servicing Agreement.

2. The undersigned is a Servicing Officer.

3. The aggregate amount of Collections processed during the 
   related Due Period was equal to ............................. $ 56,081,537.77

4. The aggregate amount of Class A Principal Collections processed 
   by the Servicer during the related Due Period is equal to ... $ 36,225,845.01

5. The aggregate amount of the Class A Finance Charge Collections 
   processed by the Servicer during the related Due Period is equal 
   to.............................................................$ 3,412,585.88

6. The sum of all amounts payable to the Class A Certificateholders
   on the current Distribution Date is equal to ......................... $ 0.00

7. The aggregate amount of Class B Principal Collections processed 
   by the Servicer during the related Due Period is equal to ..... $3,623,609.57

8. The aggregate amount of the Class B Finance Charge Collections 
   processed by the Servicer during the related Due Period is 
   equal to ....................................................... $ 341,355.15

9. The amount of drawings under the Class B Credit Enhancement required to be
   made on the 

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   succeeding Drawing Date pursuant to
   (a) Section 4.03(c)(i)(G) is equal to................................. $ 0.00
   (b) Section 4.03(c)(i)(H) is equal to................................. $ 0.00
   (c) Section 4.05 is equal to.......................................... $ 0.00

10. The sum of all amounts payable to the Class B Certificateholders 
    on the current Distribution Date is equal to......................... $ 0.00

11. The total amount to be deposited in the Principal Funding Account
    on the related Distribution Date is equal to ....................... $ 0.00

12. The total amount on deposit in the Principal Funding Account 
    (after giving effect to the deposit referred to in Item 11 
    above) will be equal to ............................................. $ 0.00

13. The total amount to be deposited in the Interest Funding Account 
    on the related Distribution Date is equal to .................$ 1,429,833.33

14. The total amount on deposit in the Interest Funding Account 
    (after giving effect to the deposit referred to in Item 13 above) 
    will be equal to ............................................ $ 1,429,833.33

15. The Invested Amount as of the end of the current Distribution Date
    ........................................................... $ 253,000,000.00

    (a) for the Class A Certificateholders will be equal to ... $ 230,000,000.00

    (b) for the Class B Certificateholders will be equal to .... $ 23,000,000.00

16. Attached hereto is a true copy of the statement required to be delivered by
    the Servicer on the date of this Certificate to the Trustee pursuant to
    section 5.02.


   IN WITNESS WHEREOF, the undersigned has duly executed and delivered this
certificate this day of March 16, 1998



                                        GREENWOOD TRUST COMPANY, as Servicer

                                        By: 
                                           -------------------------------------
                                           Title: Vice President, Director of
                                           Accounting and Treasurer