Exhibit 23a CONSENT OF INDEPENDENT ACCOUNTANTS We hereby consent to the incorporation by reference in the registration statements on Form S-3 for the Shareowner Dividend Reinvestment and Stock Purchase Plan (Registration No. 333-00573), Forms S-8 for the AT&T Long Term Savings and Security Plan (Registration Nos. 333-47257 and 33-34265), Forms S-8 for the AT&T Long Term Savings Plan for Management Employees (Registration Nos. 33-34264, 33-29256 and 33-21937), Form S-8 for the AT&T Retirement Savings and Profit Sharing Plan (Registration No. 33-39708), Forms S-8 for Shares Issuable Under the Stock Option Plan of the AT&T 1987 Long Term Incentive Program (Registration Nos. 333-47251 and 33-56643), Form S-8 for the AT&T of Puerto Rico, Inc. Long Term Savings Plan for Management Employees (Registration No. 33-50819), Form S-8 for the AT&T of Puerto Rico, Inc. Long Term Savings and Security Plan (Registration No. 33-50817), and Post-Effective Amendment No. 1 on Form S-8 to Form S-8 Registration Statement (Registration No. 33-54797) for the AT&T 1996 Employee Stock Purchase Plan, Form S-8 for the AT&T Shares for Growth Program (Registration No. 333-47255), Form S-8 for the AT&T 1997 Long Term Incentive Program (Registration No. 33-28665), Form S-3 for the AT&T $2,600,000,000 Notes and Warrants to Purchase Notes (Registration No. 33-49589), Form S-3 for the AT&T $3,000,000,000 Notes and Warrants to Purchase Notes (Registration No. 33-59495), Form S-4 for the AT&T 5,000,000 Common Shares (Registration No. 33-57745), and in Post-Effective Amendment Nos. 1, 2 and 3 on Form S-8 to Form S-4 Registration Statement (Registration No. 33-42150) for the NCR Corporation 1989 Stock Compensation Plan (Registration No. 33-42150-01), the NCR Corporation 1984 Stock Option Plan (Registration No. 33-42150-02) and the NCR Corporation 1976 Stock Option Plan (Registration No. 33-42150-03), respectively, and the Post-Effective Amendment Nos. 1, 2, 3 and 5 on Form S-8 to Form S-4 Registration Statement (Registration No. 33-52119) for the McCaw Cellular Communications, Inc. 1983 Non-Qualified Stock Option Plan (Registration No. 33-52119-01), the McCaw Cellular Communications, Inc. 1987 Stock Option Plan (Registration No. 33-52119-02), the McCaw Cellular Communications, Inc. Equity Purchase Plan (Registration No. 33-52119-03) and the McCaw Cellular Communications, Inc. Employee Stock Purchase Plan (Registration No. 33-52119-05), respectively, and Post-Effective Amendment No. 1 on Form S-8 to Form S-4 Registration Statement (Registration No. 33-45302) for the Teradata Corporation 1987 Incentive and Other Stock Option Plan (Registration No. 33-45302-01), Form S-8 for the AT&T Amended and Restated 1969 Stock Option Plan for LIN Broadcasting Corp. (Registration No. 33-63195), and in Post Effective Amendment Nos. 1, 2, 3, 4 and 5 on Form S-8 to Form S-4 Registration Statement (Registration No. 333-49419) for the Teleport Communications Group Inc. 1993 Stock Option Plan (Registration No. 333-49419-01), Teleport Communications Group Inc. 1996 Equity Incentive Plan (Registration No. 333-49419-02), ACC Corp. Employee Long Term Incentive Plan (Registration No. 333-49419-03), ACC Corp. Non-Employee Directors' Stock Option Plan (Registration No. 333-49419-04) and ACC Corp. 1996 UK Sharesave Scheme (Registration No. 333-49419-05), and Form S-8 for AT&T Wireless Services, Inc. Employee Stock Purchase Plan (Registration No. 333-52757), and in Post-Effective Amendment Nos. 1 and 2 on Form S-8 and Post-Effective Amendment No. 3 to Form S-4 Registration Statement (Registration No. 333-70279) for the Tele-Communications, Inc. 1998 Incentive Plan, the Tele-Communications, Inc. 1996 Incentive Plan (Amended and Restated), the Tele-Communications, Inc. 1995 Employee Stock Incentive Plan (Amended and Restated), the Tele-Communications, Inc. 1994 Stock Incentive Plan (Amended and Restated), the Tele-Communications, Inc. 1994 Nonemployee Director Stock Option Plan, the Tele-Communications International, Inc., the 1996 Nonemployee Director Stock Option Plan, the Tele-Communications International, Inc. 1995 Stock Incentive Plan (Registration No. 333-70279-01), the Liberty Media 401(K) Savings Plan, the TCI 401(K) Stock Plan (Registration No. 333-70279-02), Form S-3 for the $13,080,000 Debt Securities and Warrants to Purchase Debt Securities (Registration No. 333-71167) and Form S-4 for Vanguard Cellular Systems, Inc. (Registration No. 333-75083) of AT&T Corp., and Form S-4 for Media One Corp. (Registration No. 333-86019) of AT&T Corp., and Form S-4 for Four Media Corp. (Registration No. 333-30250) of AT&T Corp., and Form S-8 for AT&T Long Term Savings (Registration No. 333-87935) of AT&T Corp., of our report dated March 9, 2000 relating to the consolidated financial statements of AT&T Corp. and its subsidiaries, which appears in the 1999 Annual Report to Shareholders, which is incorporated in this Annual Report on Form 10-K. We also consent to the incorporation by reference of our report dated March 9, 2000 relating to the financial statement schedule, which appears in this Form 10-K. PricewaterhouseCoopers LLP New York, New York March 27, 2000 Exhibit 23b CONSENT OF INDEPENDENT ACCOUNTANTS We consent to the incorporation by reference in the following AT&T Corp. registration statements of our report dated February 29, 2000, relating to the combined balance sheets of Liberty Media Group ("New Liberty" or "Successor") as of December 31, 1999, and of Liberty Media Group ("Old Liberty" or "Predecessor") as of December 31, 1998, and the related combined statements of operations and comprehensive earnings, combined equity and cash flows for the period from March 1, 1999 to December 31, 1999 (Successor period) and from January 1, 1999 to February 28, 1999 and for each of the years in the two-year period ended December 31, 1998 (Predecessor periods), which appears as an exhibit to this AT&T Corp. 1999 Annual Report on Form 10-K: Registration Form Statement No. Description - ---- ------------- ----------- S-3 333-00573 Shareowner Dividend Reinvestment and Stock Purchase Plan S-8 333-47257 and 33-34265 AT&T Long Term Savings and Security Plan S-8 33-34264, 33-29256 and 33-21937 AT&T Long Term Savings Plan for Management Employees S-8 33-39708 AT&T Retirement Savings and Profit Sharing Plan S-8 333-47251 and 33-56643 Shares Issuable Under the Stock Option Plan of the AT&T 1987 Long Term Incentive Program S-8 33-50819 AT&T of Puerto Rico, Inc. Long Term Savings Plan for Management Employees S-8 33-50817 AT&T of Puerto Rico, Inc. Long Term Savings and Security Plan S-8 33-54797 (Post-Effective Amendment No. 1) AT&T 1996 Employee Stock Purchase Plan S-8 333-47255 AT&T Shares for Growth Program S-8 33-28665 AT&T 1997 Long Term Incentive Program S-4 33-57745 AT&T 7,500,000 Common Shares S-8 33-42150 (Post-Effective Amendment No. 1 to NCR Corporation 1989 Stock Compensation Plan Form S-4, (33-42150-01)) S-8 33-42150 (Post-Effective Amendment No. 2 to NCR Corporation 1984 Stock Option Plan Form S-4, (33-42150-02)) Registration Form Statement No. Description - ---- ------------- ----------- S-8 33-42150 (Post-Effective Amendment No. 3 to NCR Corporation 1976 Stock Option Plan Form S-4, (33-42150-03)) S-8 33-52119 (Post-Effective Amendment No. 1 to McCaw Cellular Communications, Inc. 1983 Non-Qualified Form S-4, (33-52119-01) Stock Option Plan S-8 33-52119 (Post-Effective Amendment No. 2 to McCaw Cellular Communications, Inc. 1987 Stock Option Form S-4, (33-52119-02) Plan S-8 33-52119 (Post-Effective Amendment No. 3 to McCaw Cellular Communications, Inc. Equity Purchase Form S-4, (33-52119-03) Plan S-8 33-52119 (Post-Effective Amendment No. 5 to McCaw Cellular Communications, Inc. Employee Stock Form S-4, (33-52119-05) Purchase Plan S-8 33-45302 (Post-Effective Amendment No. 1 to Teradata Corporation 1987 Incentive and Other Stock Form S-4, (33-45302-01)) Option Plan S-8 33-63195 AT&T Amended and Restated 1969 Stock Option Plan for LIN Broadcasting Corp. S-8 333-49419 (Post-Effective Amendment No. 1 to Teleport Communications Group Inc. 1993 Stock Option Form S-4, (333-49419-01)) Plan S-8 333-49419 (Post-Effective Amendment No. 2 to Teleport Communications Group Inc. 1996 Equity Form S-4, (333-49419-02)) Incentive Plan S-8 333-49419 (Post-Effective Amendment No. 3 to ACC Corp. Employee Long Term Incentive Plan Form S-4, (333-49419-03)) S-8 333-49419 (Post-Effective Amendment No. 4 to ACC Corp. Non-Employee Directors' Stock Option Plan Form S-4, (333-49419-04)) S-8 333-49419 (Post-Effective Amendment No. 5 to ACC Corp. 1996 UK Sharesave Scheme Form S-4, (333-49419-05)) S-8 333-52757 AT&T Wireless Services, Inc. Employee Stock Purchase Plan S-8 333-70279 (Post-Effective Amendments Nos. 1 Tele-Communications, Inc. 1998 Incentive Plan and 3 to Form S-4, (333-70279-01)) Tele-Communications, Inc. 1996 Incentive Plan (Amended and Restated) Tele-Communications, Inc. 1995 Employee Stock Incentive Plan (Amended and Restated) Tele-Communications, Inc. 1994 Stock Incentive Plan (Amended and Restated) Tele-Communications, Inc. 1994 Nonemployee Director Stock Option Plan Tele-Communications International, Inc. 1996 Nonemployee Director Stock Option Plan Tele-Communications International, Inc. 1995 Stock Incentive Plan Registration Form Statement No. Description - ---- ------------- ----------- S-8 333-70279 (Post-Effective Amendments No. 2 to Liberty Media 401(K) Savings Plan Form S-4, (333-70279-02)) TCI 401(K) Stock Plan S-3 333-71167 $13,080,000 Debt Securities and Warrants to Purchase Debt Securities S-4 333-75083 Vanguard Cellular Systems, Inc. S-4 333-86019 Media One Corp. S-4 333-30250 Four Media Corp. S-8 333-87935 AT&T Long Term Savings KPMG LLP Denver, Colorado March 27, 2000