John Dvorak has a interesting piece on Burroughs here :
"The [ElectroData derived Burroughs 205] drum had two sections. The high speed access section which had each piece of data duplicated 10 times and offset on various bands on the drum to increase the access time by 10. Here the average data access time was .85 milliseconds."
my mom performed her bank clerk job on Burroughs Adding Machines, in the early 50s.
