History
-  Initially software was tied to the hardware and free 
 
-  Organized collections: SHARE, ACM collected algorithms on tape
 
-  1970s Academic distribution of Unix in source code form
 
-  1983: Richard Stallman and the GNU Project
 
-  Late 1980s: X Window System
 
-  1991: Linus Torvalds and the Linux kernel
 
-  1998: Netscape releases Mozilla; the Open-Source Movement