shell
Depends on what you mean by "programmable". AIX is the commercial offshoot version of UNIX provided by IBM and is proprietary.
In order to legally be called a "Unix" system, operating systems must undergo a rigorous and expensive certification procedure. "Unix-like" refers to systems that have an architecture similar to Unix, but have not undergone certification.
- The functioning of UNIX operating system is handled in three levels. At the heart of UNIX is the kernel, which interact with actual hardware. Kernel is the fundamental part(core) of the OS. That resides in main memory at all times. On the outer crust are the application packages and user programs. The dilled layer is the shell which acts as a mediator that translates the commands given by the application programs in the outer later and conveys them to the kernel layer. The kernel then executes these commands using the inner hardware.
fpga has fine grain architecture and it can be programmed easily at field
fpga has fine grain architecture and it can be programmed easily at field
A Unix shell can be obtained in Cygwin, a Unix compatibility layer used to compile Unix programs and run them on Windows. Microsoft also makes a shell known as "Windows PowerShell" which incorporates more Unix-like features than the standard command prompt.
Indefinite. It is dependent on the computer architecture and the version being used.
No. Linux is a free, open-source version of UNIX. Many of DOS's commands were based on UNIX commands, but the underlying operating system is much more powerful than DOS.
A Unix clone is an operating system that is designed to be compatible with the original Unix operating system, typically by replicating its functionality, commands, and programming interfaces. These clones often aim to provide a similar user experience while being developed independently. Examples include Linux and BSD systems, which share core Unix-like features but differ in design, architecture, and licensing. Unix clones have significantly contributed to the proliferation of Unix-like systems in various computing environments.
GUI Layer[for UI designing],Bussines Layer[to program,calculation] and DataLink Layer[to access database]
Network
transport