A table with dimensions of 2 × 6 has ________ cells

_____ is a powerful operating system originally developed by AT&T for minicomputers-the predecessors of servers that are larger than PCs and smaller than mainframes.

Fill in the blank(s) with the appropriate word(s).

__________ increases performance by holding information in memory (as opposed to on disk) in case the information is needed a second time.

a. Caching b. Multitasking c. The virtual memory manager d. Buffering