Operating Systems In A Nutshell !

909 words - 4 pages

Operating systems are event driven collection of programs that manages integrate hardware and software services and makes them available to users, hardware, and other operating systems. The main goal for an Operating system is to make it easier for users and I/O devices. The major services of the operating system are:

User Interface and Command Execution Services
The main purpose of this service is to be an intermediate between the user and the computer. The two main interfaces are the Graphical User Interface GUI and the Command Line Interface CMI. As their names suggest with the GUI everything is primarily displayed as images and somewhat “dumb-ed” down for users. The CMI mechanism ...view middle of the document...

These drivers are usually stored in the systems BIOS. The Basic Input Output System is responsible for initializing major I/O devices when first starting up a computer. Some of these I/O peripherals include the keyboard, mouse, graphics card, hard disk…etc

Process Control Management
A process is simply a program in execution. The Operating system, which also consists of processes, manage these processes giving them the “right of execution.” Also it keeps track of what resources each process needs and what resources have been released from a process to make it available for other processes. Some programs break down processes even further down into what is called threads.

Memory Management
Memory management is a very important service of an operating system. It allocates memory for process to be able to execute. It also keeps track of memory in use, and may provide a process with more memory as needed. It also clears up memory when a process is done with execution. The concept of virtual memory becomes very important here, and the reason why the user feels the computer is actually multi-tasking, doing more than one thing at a time. I will elaborate about this concept in a later post.

Scheduling and Dispatch
In order for no process to starve the operating system is in charge of scheduling which process is next on the list to be executed, this is called high level scheduling. It is also responsible of dispatching the processes, in which is the actual selection of the process in which will transmitted for execution.

This task is a very hard task in order to have an efficient and smooth running system. There are many strategies used. The first one is the a program uses the CPU and once it needs to use an I/O device the...

Other assignments on Operating Systems In A Nutshell !

Essays

1619 words - 7 pages memory. Most modern computer systems use disks as the principle on-line storage medium, for both programs and data. The operating system is responsible for the following activities in connection with disk management: Free space management Storage allocation Disk scheduling I/O System Management The I/O system consists of: A buffer-caching system A general device-driver interface

Lockheed Martin Annual Report Disclosure Analysis

926 words - 4 pages Lockheed Martin in 2012. The Annual Report also shows the financial data based on business segments. It only states the figures for the net sales, operating profit, intersegment sales, depreciation & amortization and capital expenditure of each business segment. There is no specific information elaborating on the proportion of expenditures for Research and Development. Since Lockheed Martin is working on a number of classified projects with the

Operating Systems Comparison Outline

700 words - 3 pages Operating Systems Comparison Outline Albert Lara POS/355 January 29, 2016 Ongart (Peng) Ratchaworapong   Albert Lara Operating Systems Comparison Outline I. Introduction MAC OS X is the operating system that is currently being utilized by every MAC being sold. According to “Apple” (2016), “Built on a rock-solid Unix foundation, it’s engineered to take full advantage of what the hardware is capable of”. One of the more popular choices

Operating Systems

705 words - 3 pages NT1110_StudentName_Module1_Lab.doc 3/21/15 An operating system takes input in the form of zeros and ones -- bits -- and runs them through various circuits and processors, the hardware behaves according to built in rules. We define these rules using gates, which take input and produce an output in a structured way. The operating system allows complex programs to access hardware to get

Importance On Early Childhood Education

326 words - 2 pages school. Keep in mind also that one of my nephews has ADHD and Katie takes medication for ADD. My (almost) 13 year old nephew has been diagnosed with bipolar disorder, and still brings home good grades. None of these issues would have been changed by preschool. So there it is, in a nutshell. Like I said, I'm not necessarily anti-preschool, but for the most part, I think it's not needed, and just takes precious time away from the parents and families.

Operating Systems

496 words - 2 pages considered the first usable version of Windows? Windows 3.1 10. What was the first business version of Windows? Windows NT 11. Which version of Windows joined together the consumer and business product lines? Windows XP 12. What is the name of the version of Windows that was released in 2007? Windows Vista 13. What is the most current version of Windows Client Operating System? It was Windows 7 but a week ago

Lab 1

789 words - 4 pages on PC’s. All three are operating systems, but the internal architectures are different in each. And PC’s are very inexpensive for a basic model. (Sinoun, 2011) The Windows operating system is pretty versatile, and can be installed on PCs having variable amounts of resources. There are versions of Windows that can be installed on PCs having as little resource as 233 MHz processor and 64 MB RAM. Windows users get good choices for their operating

Deadlock It

435 words - 2 pages stress tests on drivers, in order to produce a BSOD, which will locate the driver. To the best of my knowledge deadlocks are ignored by Linux operating systems. Reference Operating Systems: Internals and Design Principles, 7/e E-Book for University of Phoenix, O. (2008). Operating Systems: Internals and Design Principles, 7/e E-Book for University of Phoenix.

Memory Management

318 words - 2 pages corruption in a stable environment. This is why memory management is so important. References Stallings, W. (2012). Operating Systems: Internals and Design Principles, (7th ed.). Retrieved from University of Phoenix eBook Collection.

Faults Within Windows

984 words - 4 pages security, the security system is provided to help the user with things that may be out of his control. At no point should a user rely solely on the use of an operating systems security, but in the situation they do there are plenty of resources available to research and weigh their pros and cons. Security faults exist and some are user encouraged. These faults are created because users believe the little adjustments they make to comfort them mean

Cisco Systems

2628 words - 11 pages | 9.00% | 9.57% | 7.45% | 6.83% | ROE | 15.87% | 17.55% | 13.74% | 33.93% | | | | | | According to the data we see a significant advantage for Cisco systems compared to the Dell Company. In all segments of the net margin, operating profit margin and gross profit margin, Cisco Systems experienced the moderate increase except for the last year (2011) where experienced a slight decline. Cisco Systems has higer ratios, but Dell has higher ROE

Similar Documents

Market Structures In Computer Operating Systems

795 words - 4 pages Market Structures in Computer Operating Systems When purchasing a new computer the discussion on which operating system to choose does not usually come up, as there had been a monopoly in this industry since 1985 (Bellis, 2013). Microsoft with its Windows platform is a giant in the computer operating systems industry. The Microsoft Windows market structure began in an oligopolistic market, became a monopoly, and developed back into

Unix Vs Ms Vs Mac Essay

1794 words - 8 pages its rivals will also be discussed. Keywords: open source, UNIX, Windows, UNIX vs. MS vs. MAC 3 The topic of what operating system is best has been a long and heated one. But, in the long run, UNIX will beat its rivals in most categories hands down. As the reader will see throughout this paper, undisputed evidence will be presented that will detail exactly how UNIX based operating systems are

Information Systems Essay

870 words - 4 pages supply chain management system. In a nutshell, this system would mostly consist of inventory control and operations. The benefit of this system would allow the company to request specific products based on the needs of the customers. Employees would be able to familiarize themselves with the sending and receiving of inventory and learning about quality control. The only disadvantage to this system would be providing low quality materials for customers

Nt1110 Essay

676 words - 3 pages among Windows, Linus, and Mac OS X operating systems. Windows is one of the most popular and well-known operating systems made by Microsoft. They say Window’s dominates the market and can be found in most businesses. Runner up to Windows is my favorite OS X operating system. This system is made by Apple and is based off of Unix. Then last but not least is Linux. Linux isn’t a single operating system but more of several distributions all based