What is the difference between a PCI and ISA slot?

isa slot   Dan isa expansion slot

Retro YouTuber TheRasteri fits an old ISA-slot SoundBlaster 16 to a motherboard TPM header to enjoy glorious DOS gaming audio

Our computers with ISA slots ISA Bus are compatible with a variety of different new and old operating systems such as MS XP Professional, MS Windows 2000, MS Hi I am interested in buying a new dell desktop, but i need One full-length ISA bus slot on it I know ISA is kinda old

zean slot 888 Buy ISA to PCMCIA adapter with a free 16-bit ISA slot and more from our comprehensive selection of Data Acquisition Accessories  One thing that is available is a PCIe to ISA chassis for old MODEM cards It's an x8 lane PCIe card with a snake that plugs into the chassis