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Re:I still use WordPerfect 6.2 for DOS by inglor_cz on Wednesday September 09, 2020 @02:57AM (#24418070)
The oldest proprietary software I came across (approx. 1995) had a LPT hardware key and stopped working as soon as you disconnected it. You could connect your printer through that key (it was a pass-through), but it behaved weirdly.

Oh, and the keys were prone to hardware failure, and replacement took weeks to arrive.

Re:I still use WordPerfect 6.2 for DOS by chongli on Wednesday September 09, 2020 @09:08AM (#24420591)
While despicable, and typical for certain classes of professional software, dongles were never required for any of the software I’ve ever used. Even the Adobe tools like Photoshop and Illustrator did not require anything other than a serial number.