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Graphics Interchange Format  |  1997-01-15  |  42.9 KB  |  419x305  |  4-bit (16 colors)
   ocr: TIME TXN1 TXN2 T1 Read ACCT#123 balance ($1,000) EL T2 ReadACCI#123 balance($1,000) T3 Update ACCTE123, adding $500 balance (now$1,500) 14 Update ACCT#123 adoing $2001 to balance(now-5200) FIGURE 1. The lost update problem.