In two to three sentences, describe how the first Mac OS was different from the operating systems used by most early PCs.

DOS: Disk Operating System. DOS was the computer operating system used in the early days of computing and was extended to PC-DOS by Bill Gates when Microsoft was asked by IBM to develop an operating system for the IBM personal computers.

Microsoft Windows. Microsoft Windows is likely the most well-known and common computer operating system in the world today.

to change your username, you must:

1) make sure what the username you want to change to is allowed in this community

2) contact a administrator (for example, jaysl)

3) through pm, tell the admin what you want to change to

4) if the username is allowed, it will be changed in a matter of seconds (minutes at most)

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