11. Newer versions of the Reservisor included magnetic drum systems for storing flight information further into the future. 12. Secondary storage was provided by magnetic drums , each of 4, 096 words-about 20k. 13. This was complemented by an additional 8192 words of backing store on magnetic drum ( 3000 rpm ). 14. Transfers to and from magnetic drum was interleaved to allow some processing between transfers to / from consecutive blocks. 15. The second was the permanent memory containing the translators and so on, which used the magnetic drum store. 16. Delay Line 11 ( DL11 ) served as the buffer between the magnetic drum and the high-speed store. 17. ILLIAC II had 8192 words of core memory, backed up by 65, 536 words of storage on magnetic drums . 18. As the names imply, both of the NRL systems relied on the comparison of returned signals stored on magnetic drums . 19. This computer consisted of a single magnetic drum , each memory location holding the number of seats left on a particular flight. 20. Lindquist's first optical mark recognition scanner used a mimeograph paper-transport mechanism directly coupled to a magnetic drum memory.
