There's really two versions of Windows 95. The original retail release is quite limited, and lacks a lot of things that people now assume were always there. Th

There's really two versions of Windows 95. The original retail release is quite limited, and lacks a lot of things that people now assume were always there. There were approximately four (or six, depending on how you count) later revisions, but the big one was "OEM Service Release 2", which added support for FAT32, Infrared data, UDMA, IRQ Steering, Firewire, MMX, and P6 support. A later minor patch also added support for USB and AGP. The later OSR "2.5" also came bundled with IE4, which overhauled the Explorer interface, adding (amongst other things) the quick launch bar, IE integration (including things like the "address" bar in Explorer windows), and the Active Desktop. Today, many people assume these things came along with Windows 98 first, which is not true.