When buying a used Mac or any computer, one should first plug it in to make sure it works.They should also remove the cover to make sure that there isn't anything lose, burnt or otherwise damaged.
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look at the screen , mouse, keyboard and try turning it on at if something does not seem good dont get it!
Second Generation computers. The VAX mentioned above is just a single model of first generation electronic computers.
Early Computers were large in size while today computers are compacted .Early Computers were Vaccum tube and transistor based while today computers are ICs based.Early Computers were slow and today computers are fast.Early Computers were used punch card for storage while today computers used Secondry storage ( Hard Disk) for storage.Early Computers were not user friendly todays computers are user friendly
supercomputers
The main driving factor for the development of computers was the needs of the United States defense department. The second driving factor was the United States space program.
As I recall from my days long ago as an office worker, both McWhatever and MacWhatever are supposed to be alphabetized as MacWhatever in file cabinets, because it simplifies finding files later when you don't necessarily remember whether the name you're looking for started with "Mac" or "Mc". Having said that, computers don't follow that rule, so lists of names alphabetized by computer will put "Mac" names before "Mc", because the second letter "a" in the former comes before the second letter "c" in the other.