Birth of UNIX/LINUX based systems along with C




Unix has a vast history. It all started when in 1965 three major companies-MIT, General Electric and Bell laboratory of AT&T (American Telephone and Telegraph Company) started to work on a project named MULTICS (Multiplexed Information and computing system).
Later, when the project was not showing any progress, so, Bell laboratory's scientists withdrew from the project, which made the project to drop.
But, Interestingly two of the scientists named Ken Thompson and Dennis Ritchie continued their work. They worked on UNICS(Uniplexed Information and computing system) which was made on a machine named PDP-7.
“The main idea of developing these systems were to make a multi-user Operating system”
Now, when they made UNICS there was a problem of portability since all of the code was in assembly language. So, Ken thompson made a language named B. Though B, sufficiently performed well but still they wanted a better approach. So, Dennis Ritchie started to work on a language named C (Birth of our C language).
C gave fascinating results so, with this Bell Laboratories also joined and first manual of unix was made public at 1971 by AT&T. UNIX was 95% C language and 5% Assembly language.
Due to this Dennis Ritchie and Ken thompson were awarded with ACM Turing Award [Highest award in computer science field].
Good Luck and Happy Learning. 

Comments

Post a Comment

Popular posts from this blog

How does marine life survive in Antarctica?

Hello.. Hope you all are doing well.  Everyone knows that polar bears in Antarctica depends on fishes to survive. But then how does fish survive the chilled water.  So, Water has a property called anomalous expansion. Like every liquid water contracts when cooled, but it only contracts till 4° C, after that it starts to expand at prodigious rate until it reaches 0° C. Due to this expansion the water, the bottom is filled with dense water with constant temperature of 4°C while the upper surface converts to ice. Once, upper surface converts to ice  the oxygen is trapped inside, which helps fishes to survive. Also, we have algae which provides more than half of world's oxygen. Thanks for your time.
Read more

Knowledge on the internet should be free

Hello .. Hope you are having a great day.😊 During the 1990s when world wide web was developed by Sir Tim Berners lee . He could have monetized it and could have made money out of it, but he didn't, instead, he created a place where people could come and share each other's knowledge. Now everything has changed, A person does all his research and for showing that to us he publishes it with the help of big companies who make huge profits from someone else's work. Is that fair? I mean we could do something else like why not publish it on the internet for free and then if that information will be worth buying, people will buy it. Because we all know big companies don't value that research or piece of information you are showing them, they just see money and that's all, and then that knowledge will be worthless. What do you think?
Read more

Information Security - History.

Hello there and welcome to my blog. Let’s start with the definition of Information security. Information Security  is a field of computer science which provides methods and practices in securing the data in all of its forms. Everything you do from watching movies to surfing Internet, is a form of data which needs to be protected. History of Information security When ARPANET( What is ARPANET? - Definition from WhatIs.com ) successfully came up with using TCP/IP protocol in transferring the data. Two major bodies started using it. Academic Environments. [Open model] Government Environments. [Closed model] Academic environments had an open network which was open for the public to come to access the resources of it, so people all over the globe could make use of it. Government Environments had closed network which was not open for public and could only be accessed by inside or people on that particular network. This system had a major problem. Let’s suppose you bought
Read more