This website uses cookies to ensure you have the best experience. Learn more

A Breif History Of Unix Essay

1418 words - 6 pages

A Brief History of UnixHISTORY OF UNIX AND CAUSES FOR ITS POPULARITYMost 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 elegantWritten in a high level language rather than assembly languageAllow re-use of codeTypical 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.The group worked primarily in the high level language in developing the operating system. As this development continued, small changes were necessary in the kernel and the language to allow the operating system to be completed. Through this evolution the kernel and associated software were extended until a complete operating system was written on top of the kernel in the language C.UNIX APPLICATION PROGRAMMING INTERFACEMany proprietary operating systems have a simplified view of application behavior. The typical application reads some data from disk, tape or a terminal and does some processing. Output is produced onto disk, tape, tape, terminal, or printer. The operating systems generally provide easy to use well-implemented facilities to support these types of facilities.As applications become more sophisticated they need new features such as network access, multi-tasking, and interprocess communications. In traditional operating systems, these features are often hard to use, not well documented, and only callable from assembly language. When a program makes use of these features, the program may be much more complex and much more difficult to maintain.In UNIX because the C language was written to be used to implement an operating system rather than a traditional "input-processing-output" application, use of these sophisticated features is quite easily done from the C language without writing any assembly language.In addition, the documentation for these sophisticated features is in the same format and location as the documentation for the normal application calls.When UNIX was distributed, users could write applications in C and easily make use of all of the operating system facilities. This allowed application developers to quickly develop much more sophisticated...

Find Another Essay On A Breif History of Unix

A breif description of current marketing trends

1546 words - 6 pages Current Trends of MarketingBy: Rachel JonesIn my research, I have found that marketing trends has not changed much over the years in certain aspects; it has just heightened or become more influential; organizations' must do research in order to market successfully. The market mix focuses on the four P's- Product- is anything offered for attention, acquisition, use, or consumption that might satisfy a want or need, such as goods and services

Its breif history about greece, age of exploration etc

3236 words - 13 pages Churcha.Popes and bishops - were being patrons rather than religious figuresb.Great Schism - Huss and Wycliff criticized church - ppl lost respect for churchc.Church money spent to beautiful Vatican (ppl's tithes)d.Lack of education of priests2.Individualism - Open discussion on religiona.EDUCATION.... HUMANISMb.Thomas More wrote a book - In Praise of Folly (prolly unimportant)i.Another book written.... UTOPIAii.BOTH CRITICIZED CHURCH3.Invention

A breif history of the reasons in which the Israelites and Palestines have been waring and why peace may never be acived

953 words - 4 pages was largely Arab (Hare 17)." "The Palestinians resent that so many non-Arabs now have control over much of their father's homeland (Hare 18)." The difference in their customs is so huge because of their different beliefs and religions. "A notable extreme in both religions, Islamic and Judaism, that killing a member of the other religion is a honorable act (Oz 23)."Finally, the one thing that separates all is war. "Throughout Israel's history

A Breif History of the Hard Drive

943 words - 4 pages In 1956 the world's first hard drive was produced by IBM. The IBM system 305 hard drive consisted of twenty four fifty inch platters that were coated with iron oxide paint.(Wright) Each platter had a recording surface on each side resulting in one hundred total recording surfaces. Each surface then had one hundred tracks for recording. The disk spun at 1200 RPMS, had a data transfer rate of 8800 bytes per second and a total capacity of five

A Breif History On Martha Graham

407 words - 2 pages Martha Graham Born in 1894, was a drop out of the Denishawn School of dance. Father was a doctor of nervous mental disorders. Her approach to choreography was from the heart. At 22, she was plain and overweight and alcoholism soon took over her career. She was the first person to open up a multi-racial club and she encouraged dancers to dance as individuals. She rebelled religious boundaries 1917

A breif narration of the Pequod War

522 words - 2 pages The Pequod WarEnglish/North American HistoryThe Pequods are not something you usually hear of, but they were a variety of Indian that lived in the area of Connecticut. The new settlers of Connecticut did not know these Indians very well. They would later learn, the hard way, just who they were.At first the Pequods and the English settlers left each other alone. The Pequods then started to fight with the settlers. Three angry Pequods later killed

A History Of Telecommunications

3663 words - 15 pages until the 1830’s that electrical telecommunications systems started to appear. So to finish the quick glance into telecommunications history and provide a high level outline I would submit the following excerpt from Wikepedia as the significant developments leading to mine. Text editing and Storage: • 3000BC: Papyrus • 59BC: First Newspaper • 100AD: creation of paper • 953: first fountain pen

A History of Japan

1524 words - 6 pages Japans history dates back almost 53,000 years and is filled with interesting and fascinating events. Most of Japans actions have left the major world powers in the world stunned. The base of this amazing country is astonishing just by itself. The base is a bunch of active and large under water volcanoes. Japans uniqueness from the rest of the world ranges from its culture to its very interesting history to the change in government every few

A History of Hacking

1697 words - 7 pages Hackers have a very rich history, despite being most commonly linked to the latest outburst of technology. They've helped excel many of the everyday gadgets a majority of the population owns and uses today. Not only have they established a very well known name today when it comes to computers, but nearly every piece of technology we know today can be linked back to them. They have advanced greatly in both their knowledge of computers as well as

A History of Language

741 words - 3 pages The history of the English language is a fascinating topic, and throughout his essay, Myers discusses the ways in which American English has changed recently. There are many reasons for this change, such as wars, increased technology, social movements, and the pure passage of time, but each of those and their components have had their own effect on the English language that is used on a day to day basis today. Wars and social movements have

A History of Violence

2038 words - 8 pages A History of Violence is a 2005 American crime thriller film. The movie is an adaption of the novel, A History of Violence, written by John Wagner and Vince Locke. Tom Stall lives a casual, easygoing life as a local restaurant owner in the small, quaint, town of Millbrook, Indiana. Viewers are given the perspective that Tom lives the life of a family man, with a loving wife and two kids. Then the unthinkable happens when two robbers show up at

Similar Essays

History Of Unix Essay

896 words - 4 pages primarily associated with Ken Thompson and Dennis Ritchie. The reason behind its development was, remarkably enough, because Ken Thompson had developed a game called Space Travel for a mainframe OS. Mainframe time was expensive. They decided to transform the game to run on a smaller computer. But a new operating system was needed and voila! - UNIX.The UNIX project team members established a set of guidelines to assist them in development of the

Modern Piracy With A Breif History

2002 words - 8 pages in merchant and navy ships were as severe as before so there was still a great reason to turn to piracy. It was called the golden age because at this time there were more pirates (not to mention the number of the well know pirates) than ever before and their amount of plunder was far greater than any other period in history. From this time period the original term “piracy” got its name and fame. This statement been said, “Piracy could never be

A Breif H Istroy Of Atms Essay

2401 words - 10 pages A Brief History Of ATMs ATMs have been around for almost a quarter of a century, but fees, especially double fees, for using them are a more recent phenomenon. When ATMs were introduced in the 1970s, they were set up only inside or immediately outside their banks' branch offices. They were seen by banks largely as a way of saving money, by reducing the need for tellers. Even with the relatively expensive computer technology of the late '70s

My Trail Of Tears Essay Is A Breif History Review Or The Trail Of Tears

1083 words - 4 pages mistreatment and the abuse that was wrought upon the Cherokee Indians. It was a trail of blood, a trail of death, but ultimately it was known as the "Trail of Tears". In this history of the Cherokee Nation we are trying, but without success, to be as unbiased as possible. It's the War of 1812. Andrew Jackson is mounting up forces against the Pro-British faction of the Creek Indians. The United States appealed for Cherokee support for aid in war against