Computer Basic Information
The essential difference between an operating system like Linux and one like Windows is that

Linux is proprietary, whereas Windows is not.
None of these
there are multiple versions of Linux, but only one version of Windows.
Windows can run with an Intel processor, whereas Linux cannot.
any programmer can modify Linux code, which is not permitted with Windows.

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Computer Basic Information
Bit map terminal

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

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