Oppenheimer Fund, Inc. v. Sanders, 437 U.S. 340 (1978)

Key Insight: Requiring defendant to bear expense of identifying class members was abuse of discretion where cost of effort (over $16,000), which included manually sorting records, keypunching and creating software programs, would be same for plaintiff and no special circumstances existed

Nature of Case: Securities fraud class action

Electronic Data Involved: Computer tapes