IX. Think over and fill in the necessary word from the list given below

including, software, development, include, developed, architectures, refer, environments,embedded

1. The Unix-like family is a more diverse group of operating systems, with several major sub-categories … System V, BSD, and Linux.

2. The name "Unix" is a trademark of The Open Group which licenses it for use to any operating system that has been shown to conform to the definitions that they have cooperatively ….

3. The name is commonly used to … to the large set of operating systems which resemble the original Unix.

4. Unix systems run on a wide variety of machine ….

5. Unix systems are used heavily as server systems in business, as well as workstations in academic and engineering ….

6. Free … Unix variants, such as Linux and BSD are increasingly popular, and have made inroads on the desktop market as well. Apple's Mac OS X, a BSD variant, has replaced Apple's earlier (non-Unix) Mac OS in a small but dedicated market, becoming one of the most popular Unix systems in the process.

7. Mainframe operating systems, such as IBM's z/OS, and … operating systems such as QNX, eCos, and PalmOS, are usually unrelated to Unix and Windows.

8. Older operating systems which are still used in niche markets … the Windows-like OS/2 from IBM; VMS from Hewlett-Packard (formerly DEC); Mac OS, the non-Unix precursor to Apple's Mac OS X; and AmigaOS, the first GUI based operating system with advanced multimedia capabilities available to the general public.

9. Research and … of new kinds of operating systems is an active subfield of computer science.

Task 4 Can you write? Let’s do it!