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In page William Seward Burroughs I:

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In 1875, he started working as a bank clerk. Much of his job consisted of laboriously reviewing ledgers for errors.[1] Burroughs then became interested in developing an adding machine. At the bank, there had been a number of prototypes, but in inexperienced hands, they would sometimes give incorrect answers. Burroughs did not find his clerical work agreeable, as he was fond of mechanics. He resigned after seven years working as a clerk.[citation needed]