Open Source Software Some perspectives
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1 Open Source Software Some perspectives
2 Who was DMR? Introduction
3 Introduction Who was DMR? Who was Steve Jobs?
4 Introduction Who was DMR? Dennis M Ritchie Creator of C and Unix in 1970s Ritchie was under the radar. His name was not a household name at all, but... if you had a microscope and could look in a computer, you'd see his work everywhere inside.
5 History In 50s and 60s software was written as public domain software and as such was shared. Hardware used to be sold with software and its source code. Customers could update and fix bugs and share the updates with others Until 1974, software was not even copyrighted.
6 Three Phases of Free Software Pre-PC era Before the Personal Computers, all software was developed and used ay work places or educational institutions. Free Software was written and shared amongst these institutions. Limited production Limited Distribution Limited Access
7 Three Phases of Free Software Pre-PC era From 70s onwards, companies started charging licensing fees on software. At this time Bell Labs gave Unix along with the C language for free to Educational Institutions and research labs. There was no concept of releases. DMR would send tapes of updated software on request. Thousands of graduates during these years joined the workforce trained in C and Unix.
8 Three Phases of Free Software PC era Computer usage moved into homes. Many non technical people could use computer for simple tasks like writing, playing games etc. Free software for playing games, writing etc was available in many stores for just the cost of media (floppies etc). Many books contained free software.
9 Three Phases of Free Software PC era For Technical people, Unix variants were available for free and came with source code and free C compiler. More people could write and share software. BBS (online Bulletin Board services) were used to share software. Non Software products like protocol standards were available on CDs (CCITT7) More widespread production Wider distribution Wider Access.
10 Three Phases of Free Software PC era Installation of such software was hard poor documentation Different platforms and versions required some sort of customization to install. Poor support for bug fixes. Help in case of problems was hard to get.
11 Three Phases of Free Software Internet Era Internet has fueled massive expansion of all kinds of freeware. Any one can write software and share it. Web sites help in distribution of useful software. Any one can download many kinds of software for free with a click of mouse.
12 Three Phases of Free Software Internet Era Unix and C have become almost mainstream in Business world. Installation of most software is streamlined. In case of problems, help is available on line for most issues.
13 Three Phases of Free Software Internet Era Almost all networking protocols are now open source and available for free online. Tutorials on most topics are available for free. Online copyright free streaming music is available for use. Streaming movies Free games
14 Motivation for free software History of software writing is rooted in sharing of source code for free. Sharing with colleagues provides a quick proof of concept. Helps in learning process. Open source means lots of developers can see the source code prevents malicious code from getting in. The thrill of making something work.
15 Networking Software - PSTN One of the first I used was open source SS7 protocol suite. MTP2, MTP3, TUP, ISUP etc.. Provided a good learning experience
16 Networking Software - VOIP During the transition to VOIP many of the protocol stacks were available for free download SCTP SIP SIGTRAN Many startups used these free stack to develop products Softphones on the internet to test the VOIP products. Many commercial stacks were expensive and came with lots of bugs Customers had to help in solving the bugs for timely project development.
17 Photo/Video/Graphics Open source software for picture manipulation compares well with top of the line commercial software GIMP vs Adobe Photoshop. Several good quality video editing software available for free download
18 Other software Open source office suite compares well to the Microsoft commercial Suite. Web Browsers like Firefox compare to google Chrome.
19 Efforts at UTD I currently work on two Open source software projects. IOT based projects Digital Forensics recover deleted partitions/directories/files.
20 Open Source Future The battle between Open source vs Commercial will continue Open Source has made its presence permanent. Microsoft s efforts to sideline Linux have failed. Linus is there to stay. Other open source software continue to develop developers around the world will continue to contribute.
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