• Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

A Brief History of UNIX.

Extracts from this document...

Introduction

A Brief History of Unix By Charles Severance This document is designed to give people with no previous UNIX experience some sense of what UNIX is. This document will cover the history of UNIX and an introduction to UNIX. HISTORY OF UNIX AND CAUSES FOR ITS POPULARITY Most discussions of UNIX begin with the history of UNIX without explaining why the history of UNIX is important to understanding UNIX. The remainder of this document will describe some strengths and weaknesses of UNIX and attempt to explain why UNIX is becoming popular. All of UNIX's strengths and weaknesses can be directly related to the history of its development, hence a discussion of history is very useful. UNIX was originally developed at Bell Laboratories as a private research project by a small group of people starting in 1969. This group had experience with a number of different operating systems research efforts in the 1970's. The goals of the group were to design an operating system to satisfy the following objectives: Simple and elegant Written in a high level language rather than assembly language Allow re-use of code Typical vendor operating systems of the time were extremely large and all written in assembly language. UNIX had a relatively small amount of code written in assembly language (this is called the kernel) and the remaining code for the operating system was written in a high level language called C. ...read more.

Middle

Systems based on this and later BSD releases provided a multi-vendor networking capability based on Ethernet networking. The networking support included, remote login, file transfer, electronic mail, and other important features. As UNIX was ported onto more and more different types of computer hardware the UNIX networking allowed many different types of systems to share and mutually use data. Networks consisting of many different systems could be used as a large distributed system. When SUN Microsystems added NFS (Network File System), this ability to share and mutually use data was significantly enhanced. UNIX POPULARITY At this point, the reader might be asking, "This document is designed for first time UNIX users. Why all of this discussion about programming and system programming?" The answer is because the document is using the history of UNIX to explain why UNIX is so popular. The application portability and system programming issues have caused many hardware and software vendors to choose UNIX. The effect of many vendors choosing UNIX is that there is a wide variety of UNIX systems available to users at attractive prices. There are three primary causes for UNIX's popularity (and none is user interface): Only a very small amount of code in UNIX is written in assembly language. This makes it relatively easy for a computer vendor to get UNIX running on their system. UNIX is nearly the unanimous choice of operating system for computer companies started since 1985. ...read more.

Conclusion

Once a user has learned UNIX, the skills can be used on many different systems. This ability for a user to work on many different makes of computer systems without re-training is called "user portability". Many users of other operating systems have converted to using UNIX because they felt that UNIX would be the "last" operating system they would have to learn. OPEN SYSTEMS There is a recent effort to define what is an "open system" in the international standards area. An open system is a system which allows application portability, system interoperability, and user portability between many different computer vendor hardware platforms. UNIX is a good example of the advantages to the user having an "open system". HISTORY SUMMARY From a simple beginning as a personal research project to an important role in the operating systems on a wide range of computer systems from desktop micros to the largest mainframes, UNIX has and will have a lot of impact. The strength of UNIX is its portability across multiple vendor hardware platforms, vendor independent networking, and the strength of its application programming interface. These benefits are so strong that the relative weak end-user interface has not slowed the adoption of UNIX. The end users are not the direct beneficiaries of the portability and the application program interface. However end-users have already seen the dramatic drop in the cost of computing when multiple vendors can provide the same operating system and software solutions. End users are currently making the choice for inexpensive and flexible computing rather than best user interface in choosing UNIX. ...read more.

The above preview is unformatted text

This student written piece of work is one of many that can be found in our AS and A Level Information Systems and Communication section.

Found what you're looking for?

  • Start learning 29% faster today
  • 150,000+ documents available
  • Just £6.99 a month

Not the one? Search for your essay title...
  • Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

See related essaysSee related essays

Related AS and A Level Information Systems and Communication essays

  1. Marked by a teacher

    Database Coursework on a Vehicle Rental System: Analysis

    5 star(s)

    This was also a topic breached upon during my interview with Fred, and he agreed that he would like overdue fees to be calculated automatically by the new system. The overdue fees will be calculated by the system by subtracting the date the vehicle is returned from the date it

  2. The Impact of Mobile Phones on social Interaction

    but has been lagging behind due to this lack of education, distrust and limitations of use. 6.5 - The pressures associated with mobile phones and their effect on social interaction As described in the previous section, due to the formation of mini social networks, individuals in this age group are

  1. The Operating System and You - Operating System Design and the Need for Human-Computer ...

    popular being BSD, Berkeley Software Distribution, developed at the University of California at Berkeley, and System V, a commercial version by AT&T. The reason for UNIX's success is due to its flexibility and power, ease of portability, and free source nature.

  2. Data Processing Task. Mr Peters, the man who runs this particular Samsung store ...

    When the data is entered into these two tables' queries can be carried out on it to help the company obtain their management statistics to help them with the operation of the company. When selected this macro will display a message box informing the user that they are about to update the tables.

  1. Free essay

    This research report will present a brief history of the Internet, focusing on some ...

    Hence, not only can links be shared but also each 'packet' can be routed independently, therefore utilizing the available link capacity, minimizing response time and increasing the robustness of communication. On 29th October 1969 computers at the University of California, Los Angeles and Stanford connected for the first time - therefore initiating the first 2 hosts.

  2. From the e-commerce strategy you gave me earlier I understand that by having a ...

    one of the people does not sign on for a long enough period of time, the account information becomes irrelevant and excessive, eg one or two years since they last logged on. This practice is known as 'data minimisation'. When you are dealing with sensitive personal information, it is important

  1. Information: G061 - Systems and Communication

    - can be positioned anywhere on page - DTP software uses frames; changes to one doesn't after another - word processing software can use frames also, however doesn't normally - changing one thing will affect another - DTP software has auto-flow feature - if text overruns in one frame, it

  2. Website Design, Creation and Evaluation

    The software automatically generates the HTML code behind the scenes. HTML Editing Dreamweaver offers hints whilst coding in HTML to make the process easier. Direct HTML editing is possible, allowing the user to directly manipulate certain sections of the website.

  • Over 160,000 pieces
    of student written work
  • Annotated by
    experienced teachers
  • Ideas and feedback to
    improve your own work