HISTORY OF UNIX
1.Origins at Bell Labs (1969): -Key Figures: Ken Thompson, Dennis Ritchie, and others at Bell Labs. -Motivation: Develop a multitasking, multi-user operating system for the PDP-7 minicomputer. -PDP-7 Assembly Language: Initial version of Unix written in assembly language. -Name Origin: A play on the name "Multics," the earlier project it aimed to replace. 2.First Edition (1971): -Language Shift: Transition to C programming language for better portability. -Basic Features: Simple kernel, file hierarchies, pipelines, and hierarchical file system. 3.Portability and C Language (1973-1974): -C Programming Language: Complete rewrite of Unix in C, making it more portable. -Software Portability: Unix could be easily adapted to different hardware architectures. 4.Berkeley Software Distribution (BSD) (1977-1995): -Berkeley Contribution: BSD versions added virtual memory, TCP/IP networking, and the vi editor. -Networking Emphasis: BSD Unix became a leading platform for networking resear...
