Resident programs and drivers: Some programs let you detect and get
information from them.

4DOS: A shareware program that replaces COMMAND.COM. It offers many
      enhancements and reduced memory requirements.
NDOS: A licensed version of 4DOS that is part of Norton Utilities 6.
WildUnix: A resident program that lets you use things like DEL *X.* to
          delete any filename ending in X. (DOS would delete everything!)
DOS/16M: A protected mode interface that lets DOS programs access more than
         1Meg of memory on AT's and 386/486s. Used by alot of major
         programs.
Phar Lap DOS Extender: Similar to DOS/16M.
QEMM/QRAM: Quarterdeck's memory managers.
Manifest: A system analyzer by Quarterdeck. It has a resident mode that
          get information while a program is running.
VIDRAM: A program by Quarterdeck that lets you use some of the EGA/VGA
        display memory for DOS. This comes at the expense of graphics
        modes, except for CGA level graphics.
Desqview: Quarterdeck's multi-tasking program. If found, information about
          available memory and screen modes/size is given.
DOS 5 task switcher: DOS 5's DOSSHELL has a task switching option. You can
                     can run several programs at once, but only one at a
                     time. It is swapped in and out of memory. The switcher
                     also is detected as Windows in real/standard mode.
TAME: A shareware program that monitors DOS programs when running under
      multi-tasking programs. If a program is doing nothing, it forces the
      program to give up it's time slot, giving more to other programs.
Windows: This is the program by Microsoft. When version 3.0 is in enhanced
         mode, alot of extra information is given.
pcAnywhere: A program that lets you operate a computer via the serial port.
Disk Spool II: A printer spooling program.
Microsoft/LANtastic: The network programs.
F-PROT: F-PROT is a shareware package of programs by Fridrik Skulason used
        to protect a computer from viruses.
TBScanX: A resident virus scanner. Usable by other programs to check
         themselves.
ANARKEY: A program that lets you re-define the keyboard.
VDS: Virtual DMA Specification is a controlled way for programs to transfer
     memory around.
CAM-SCSI: A SCSI interface standard.
CMC Int. SCSI driver: A SCSI driver.
HyperDisk: A shareware disk cache program.
PC/TCP: A packet driver interface standard.
Inset: A program that integrates text and graphics.
MSCDEX: Microsoft's CD-ROM extensions
Fossil: A TSR or device driver for using the serial ports. Many BBS
        programs use them.
Video Fossil: An extension of Fossil for working with video.