"computers are used by large businesses, government agencies, and in science and education to provide centralized storage and processing and to manipulate tremendous amounts of data. a. mainframe b. optical c. subnotebook d. external"

Mainframe

Explanation: Mainframe computers are the computer systems that are used for the operation of the large amount of the data and processing. It is mostly used in the large organization that require large amount of processing of data , controlling ,resource planning.

These are the operating system are mostly are based on the UNIX and LINUX in the growing years.

go to the black logo in top left corner of page and click and you are there

i don't know to be honest but you on your own

step-by-step explanation:

ignitia made me retarted fool im stoopid laugh like shi

explanation: