Linux gained popularity fast and nearly broke into the mainstream in the late 90s. There were a number retail software packages available that supported linux you could pickup in a store. This led to a divide between commercial and open source software for linux that I would say could be considered one of the biggest reasons for the slow adoption. It took a lot longer for a fully open source linux environment to be at parity with commercial offerings.
2000LinuxCD-ROM)
1999LinuxCD-ROM)
2001LinuxCD-ROM)
2000LinuxCD-ROM)
2005LinuxDVD)
1999IBM PCLinuxCD-ROM)
2000LinuxCD-ROM)
1999LinuxCD-ROM)
LinuxCD-ROM)
1999LinuxCD-ROM)
2002LinuxCD-ROM)
2002IBM PCMac (PowerPC)LinuxCD-ROM)
2005IBM PCLinuxCD-ROM)
1998LinuxCD-ROM)
2006IBM PCMac (PowerPC)LinuxDVD)
1999LinuxCD-ROM)
1999IBM PCLinuxCD-ROM)
1999LinuxCD-ROM)
1997LinuxCD-ROM)
2001LinuxCD-ROM)
2003LinuxCD-ROM)
2000LinuxCD-ROM)
1998LinuxCD-ROM)
1999LinuxCD-ROM)
2001LinuxCD-ROMDVD)
2000IBM PCLinuxCD-ROM)
2000LinuxCD-ROM)
2001IBM PCLinuxCD-ROM)
2006LinuxCD-ROM)
2004IBM PCLinuxCD-ROMDVD)