[RicyReetred]

Ok, I understand this really is likely to be considered a silly question but here goes. I'm as it pertains to computer material an entire fool. I got out my old messy pc (with windows 95) and realized I'd sometime ago disposed of the mouse which was compatible with it. The mouse I've now includes a square link (how that's for technical?) and the previous one was completed. Is that when they say hardware vs what they mean. ps2 link? Do the old kind be even made by them anymore?