Multi-process
True preemptive multi-tasking enables the operating system core to efficiently juggle
several running programs at once. This is important for providing multiple services on
one computer.

Multi-platform
Linux currently runs on Intel (or equivalent) based PC's, Digital/Compaq Alpha,
PowerPC-based (Apple Macintosh), Sun Sparc, Amiga, StrongARM-based
computers, many PDA’s and has recently been successfully ported to the S390 main
frame. And larger projects such as super-computers are planned by certain academic
organisations for the likes of environmental/ocean modelling. Tight budget constraints
and the easy access to source code make linux a clear favourable choice.

Interoperable
Linux interfaces with most network protocol and operating systems and file structures,
including MS windows and NT, Unix, Novell, and Mac OS.

Scalable
As your computing needs grow, you can rely on Linux to grow with you. The linux
kernel is currently scalable to four processors, with a great deal of development taking
place to increase this.

Portable
Linux is mostly written in the C programming language. C is a mid-level language,
created specifically for writing system-level software that can be readily ported to new
computer hardware.

Flexible
The linux operating system can be configured as required: A desktop workstation for
an office, a home PC for games and word-processing and internet browsing or just as
easily a company Web/FTP/print server or a network router/firewall or part of a
corporate cluster. Most distributions already include these facilities and just need
them selected.

Stable
Like its Unix ancestor linux has achieved a reputation for stability unmatched by any
other operating system. Most computers running linux only ever need to be stopped
for hardware changes. It is not uncommon for linux computers to run for several years
between downtime

Efficient
The modular design of linux enable the configuration of just the components needed
to run the desired services. Older computers, 486 and even 386 can become
useful again. E.G. the use of a 386 PC configured just as a network router/firewall.

Free
The Kernel is the property of Linus Torwalds, but linux is developed by enthusiasts in
their own time, striving for purity and functionality. Although some companies do
package and sell tailored distributions, It is possible to obtain linux distributions for no
exchange of money and in the case of linux you do not necessarily get what you pay
for. There is an active linux community only to ready to help a newcomer. Charities
and the third world may be very interested in linux because of this.