Jeez, between that and the alt text...
An image of an old computer, probably from the '80s or '90s
...y'all are making me feel old because you don't even know what you're looking at.
That's a computer from at least the second half of the '90s, if not early 2000s, because it has a CD-ROM drive. That also means it's an ATX with a software power button, not AT with a power switch.
(I guess it's theoretically possible somebody could have upgraded an early-'90s AT computer to add a CD-ROM, but so unlikely I'm willing to discount the possibility.)