This area is basically the place where all the very important system's software is. The extensions folder is what extends the Macintosh's capabilities. It also helps certain applications run or play movies, sounds, speak etc.
SAM Intercept: (Put a space before the S to make it active at startup)
SAM version 4.0.6: This scans disks that inserted into the disk drive and checks to see if there is any viruses, warns you and then removes them.
EM Extension: (Put a space before the E to make it active at startup)
System Software 7.5
About Apple Guide:
System Software 7.5
Apple CD-ROM:
Any Mac System with a CD-ROM drive (internal or external)
QuickTime™:
Color Macintosh (maybe 256 colors or more) and all the other QuickTime related Extensions.