At the beginnning of the 70’s two scientists (Ken Thompson and Dennis Ritchie) created the Unics operating system, afterwards called Unix. Apart from the first edition of the “Unix Programmer’s Manual”, Dennis Ritchie gives the C language to the humanity.  The pipe mechanism was born to provoke a revolution, leaving the assembler in the past for Unix.

Today the history has to say thanks to these two geeks who created the base for Linux/BSD among other efficient and powerful operating systems.

Here you can see a good diagram of the evolution of Unix into Minix, Linux, Mac OS X, FreeBSD, Net BSD, OpenBSD, Solaris, Open Solaris, etc.