Computer Basic Information
The magnetic disks and drums are like recirculating shift registers because

their access times are about the same
stored data is available for reading over and over again in the same order.
None of these
they have about the same storage capacity
their storage is non volatile

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Computer Basic Information
Bit map terminal

requires tremendous amount of copying and hence low performance
All of these
support displays containing multiple windows
None of these
requires considerable amount of video RAM

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