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Arguably the genesis of the person computer, let alone it was s the baseline for all personal computers to come afterward. -
This was not really the invention of laser printing technology, but rather the standard set by Hewlett Packard for the standard laser printer going forward.
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This was not necessarily invented but the protocol was adopted by IBM and later the rest of the commercial computer industry. -
The CD-ROM was an invention by Philips which allowed for the storage of more data than standard 5" or 3.5" floppy disk. While it was not writable, it did deliver means to more easily distribute software. -
Microsoft introduced the first graphic user interface based operating system. While it was still MS-DOS based start-up, later versions became what most of the world uses today for individual business and personal computing.