A Brief History of Unix :: Computer Science

A Brief History of Unix 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. 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 INTERFACE Many 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.

Roxane qimby case

Glumly has done work a lot to make the company successful. As her business Is growing, she believes that the growth Is beyond her expertise, goals and definitely beyond Maine, and she wanted to expand It more. According to me, If Glumly stays in north Calories, there are chances that the Burst's bees might grow its business in larger scale because she has expertise in calories which they can't get in Maine. She has found marketing experts and plant engineer here which helps her to manage and run her business in more efficient way.Due to lack of her formal business training, she might able in Calories to train herself by watching the experts she hired here. Below are the some advantages for staying in North Calories: Less Taxes as was in Maine Low transport cost Central Location Less labor Intensive Expertise In marketing and plant engineering High opportunities So, keeping the above factors in mind, Quinsy should need to stay in north Calories. She should need to use her manufacturin g expertise, bird-in-hand, as a basic factor in order to expand her business more. Her strong vision also beneficial act as her trench here.She need to made the innovation in her product as she did earlier in Maine by making new designs and innovative products. So by using bird-in-hand facilities, she can survive in Calories and can expand her business that results in high profit. As we know that there is risk attach with the decision. Although they had not bear any loss yet but It is not sure that It won't happened in future because business Is not all about profits, you have to face losses as well. But keeping the following opportunities Into mind, she need to start the business here and leverage reprises or contingencies by using the using the Lemonade principle.She Is aware about the risk and the entrepreneurial skills are polished in her. So she should need to avail the opportunity while keeping the risk in mind and prepare herself for anything to make those accidents as potent ial clues for next steps. No doubt If they move to calories but they need to make the partners as discussed in the case and It Is necessary if Quinsy has desire to grow her business. By going into partnership they got some benefits, although they had not bear any loss yet butIt Is not sure that It wont happened In future because business Is not all about profits, you have to face losses as well, so if Burt bees faces such situation, the loss is into partnership she might be able to fulfill her dream by staying away from business, not for a long time but for short time on leave and make her dream into reality by staying with rural women and work on product design. Quinsy can also hire the labor back from Maine- which were working with her- and give them training of new plant and technology. By this he might feel as living in Maine.

First Wave Feminism By Betty Friedan - 1171 Words

Background Knowledge: Second-wave feminism refers to the period of feminist activity that focused on social and legal issues of gender equality such as sexuality, family, the workplace, reproductive rights and equal opportunity in education and the workplace. Source 1: The Feminine Mystique by Betty Friedan In 1963, Betty Friedan’s The Feminine Mystique was published. Friedan discussed the problem that â€Å"lay buried, unspoken† in the minds of the suburban housewife, saying that they were too socially conditioned to recognize their boredom and lack of fulfillment. The book isn’t reliable in that it failed to address the struggle of minority and working-class women who didn t have the choice to stay at home or easy access to higher†¦show more content†¦In 1966, the National Organization for Women (NOW) was founded by twenty-eight women to function as a civil rights organisation for women. The majority of the organisation were white, middle-class women. The groups main goals were reproductive freedom, gender equality in the workplace and the passage of the Equal Rights Amendment. To achieve their goals they employed techniques such as legislative lobbying, legal action and public demonstrations. In Schultz v. Wheaton Glass Company in 1970, the U.S. Court of Appeals ruled that jobs held by men and women must be substantially equal but not identical to fall under the protection of the Equal Pay Act. This was a success for the feminist movement, as it made it illegal for employers to change the job titles of women workers in order to pay them less than men. Betty Friedan organised the Women s Strike for Equality on August 26, 1970 which was the 50th anniversary of woman suffrage in the U.S. 50,000 women participated in the Strike to demand equal rights. In 1972, Washington, D.C., established the first rape crisis hotline. The Title IX of the Higher Education Act was passed by Congress in 1972, meaning that discrimination on the basis of sex in any educational program was prohibited. As a result, all-male schools began to include women and athletic programs had to sponsor and