On Monday, it starts a low-speed read of a big array off magtape. Tuesday through Thursday, it continues to read the array. On Friday, a random number is chos

On Monday, it starts a low-speed read of a big array off magtape. Tuesday through Thursday, it continues to read the array. On Friday, a random number is chosen, and the activity stored in that array element is performed Friday night, possibly setting the REGRET flag. Saturday is spent shuffling the array, while on Sunday, a high-speed write of the data is performed back to tape. At 12AM Monday, the brain executes a GOTO 10 instruction, and the process repeats.