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History of operating system
History of operating system
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Introduction
Microsoft's famed Windows platforms are operating systems that are used on personal computers, servers, and varied media devices. There are several platforms that serve each of these environments. Windows XP is an operating systems oriented for desktop computers. Windows Server 2003 is a platform for hosting enterprise-wide server systems. Windows Mobile is the operating system of choice for Pocket PC enabled devices. With such a diverse portfolio, Microsoft has captured a majority of the personal computer market.
FAT
The FAT (File Allocation Table) file system has its origins in the late 1970s and early1980s and was the file system supported by the Microsoft MS-DOS operating system (Wikipedia-1). It was originally developed as a simple file system suitable for floppy disk drives less than 500K in size. Over time it has been enhanced to support larger and larger media. Currently there are three FAT file system types: FAT12, FAT16 and FAT32. The basic difference in these FAT sub types, and the reason for the names, is the size, in bits, of the entries in the actual FAT structure on the disk. There are 12 bits in a FAT12 FAT entry, 16 bits in a FAT16 FAT entry and 32 bits in a FAT32 FAT entry.
The first important data structure on a FAT volume is called the BPB (BIOS Parameter Block), which is located in the first sector of the volume in the Reserved Region (Pollard, 2006). This sector is sometimes called the "boot sector" or the "reserved sector" or the "0th sector," but the important fact is simply that it is the first sector of the volume. The BPB in the boot sector defined for MS-DOS 2.x only allowed for a FAT volume with strictly less than 65,536 sectors (32 MB worth of 512-byte sectors). This limitation was due to the fact that the "total sectors" field was only a 16-bit field. This limitation was addressed by MS-DOS 3.x, where the BPB was modified to include a new 32-bit field for the total sectors value. The next BPB change occurred with the Microsoft Windows 95 operating system, where the FAT32 type was introduced. FAT16 was limited by the maximum size of the FAT and the maximum valid cluster size to no more than a 2 GB volume if the disk had 512-byte sectors. FAT32 addressed this limitation on the amount of disk space that one FAT volume could occupy so that disks larger than 2 GB only had to have one partition defined.
Hard Disk Drive (HDD) - Hard drives can store very large amounts of data ranging from 200GB – 1TB. A hard drive is made up of a magnetic disk that consists of a number of platters/disks that are coated in a magnetic material that rotate at 7200 RPM. The data is encoded into bits and written into the disks as a series of changes in the direction of the magnetic pull, and then the data is read by detecting the changes in direction on the
This is to address speed difference between two devices, if a file is received from a slow device to be transferred to a faster device (Hard disk), a buffer is created to to gather bytes received from the slower device, when the buffer is full it can then be transferred to the disk in a single operation. However, if the buffer is full and the slow device still needs to transfer additional data, a second buffer is created to accommodate the data. After the first buffer has been filled a disk write is requested, the slow device fills the second buffer while the first buffer is written into the disk. When the second buffer
In class, we learned that fat is a source of energy. We also learned about how there are two main types of fat, saturated and unsaturated. We learned that saturated fat is the “bad” fat and unsaturated fat is the “good” fat. Saturated fat is solid at room temperature and is harder for our cells to break down. Unsaturated fat is liquid at room temperature and is able to interact and provide instructions to genes. We learned that the fats we eat, builds up over time if it is not burned off by exercising.
defined as an excess of Body Fat (BF). There is no consensus on a cutoff point for excess fatness
Windows based computers are more practical for many reasons. Possibly the most prevalent of these being that everybody uses them. When using computers consistency is very important. If everyone is using a certain operating system and software, it is easier to transfer, share, and use the data you create. Windows based systems are the standard in our community, and that is not due to change any time soon.
The similarities and the differences between Mac operating system (OS X) and Windows 10 operating system.
Microsoft was able in the OS segment to double their revenue per PC when Windows 3.x emerged which still needed MS-DOS to run. Most of the sales Microsoft made were to OEMs who would take the additional step of installing Windows on a computer’s hard drive. This strategy was effective in that the cost of production was relatively low, as an OEM may only need a single master copy to do the installation. The costs to Microsoft would largely be bore in R&D expense rather than production. As part of the Microsoft business model for this segment, Microsoft designed their OS to need periodic upgrades. The upgrades did come at a cost, and in essence, Microsoft was able to create an “annuity” stream for the Microsoft OS segment. In this segment, Microsoft had a monopolistic structure that allowed them to realize huge returns, especially during such a period of technological growth and rapid obsol...
“ In 2010 the amount of digital information created and replicated worldwide was nearly 1,203 exabytes, (an exabyte is billion gigabytes or 1018 bytes)” IDC [1]
We put all of the data onto the platters. They are inside of the hard
The primary computer storage medium, before the introduction of magnetic storage, was punch cards. These were paper cards on which holes were punched to indicate binary data invented by Herman Hollerith in the late nineteenth century. In June 1949, a group of scientists and engineers in IBM began working on creating a new storage device that would soon revolutionize the industry. May 21, 1952 marked the transition from punched-card calculators to electronic computers as IBM introduced the IBM 726 Tape Unit [1]. It was used to store data in IBM’s first commercial scientific computer intended to help the US military to design aircrafts [2]. Four years later, IBM made the first computer disk storage system: the 305 RAMAC drive. Although this drive could only store 5MB of data, information could be stored directly to any location on the disk surface without having to read all the information in between which was the case in magnetic tapes. This ability to access random locations had a very important effect on computer performance and enabled data to be stored and retrieved much faster than tapes. The next 60 years saw a huge progress in the magnetic storage industry from a variety of hard disks to portable memory such as cassette tapes, floppy disks and zip drives. Today, one can store even 3TB data on tiny 3.5 inch drives. This was all possible due to electromagnetism and the magnetic properties of ferromagnetic materials such as the oxides of iron[ add the magnetism part]
Body composition is one of the five health related fitness components and it is the percent body fat, bone, water and muscle found in your body. Although fat is associated with negative connotations, it has important functions in our body such as the cushioning of organs, shock absorption and temperature regulations. This ‘positive’ fat is known as essential fat, and the ‘negative’ fat is known as nonessential fat. The percent body fat is used to determine the total fat found in your body and it is based on gender and size of each individual. In the textbook “Concepts of Physical Fitness: Active Lifestyle for Wellness” by Corbin, he states that fat location influences health risk; based on where the fat is located you could be considered an apple or a pear. A person considered an apple has fat in the upper body. This is often found in men and in menopausal women. A pear shape, which is most common in women than men, has more fat located in the hips and upper legs. Corbin defines visceral fat as fat located at the core of the body (abdominal cavity), and subcutaneous fat as fat located under the skin.
There are several mobile operating systems like: ios, android, blackberry, symbian os, bada os, windows os, etc...In this audit we are presenting windows operating system and android operating system in brief. Features and applications of these phones have been looked closely in the audit.
An Operating system is system software that controls the system’s hardware that interacts with users and the application software. As we all may know, Windows Microsoft has always been a commercial high-level sale in the retail industry and an in domain operating system used today. But there are more operating systems than just Windows Microsoft than the general population may assume. Linux is another well-known operating systems, which is free and open-source software. Linux is also used in companies we would have never thought of like Google, NASA, USPS, Amazon and many more companies. Linux and Microsoft operating systems have been in competition to see which one is the best operating system in the market. There are so many resemblances
The hardware should be installed and configured first to enable the operating systems and software set up into the network systems. The operating system installed in the network systems should be considered as the main component of the network infrastructure. Therefore, the company should consider installing one type of operating systems, this because they have similar protocols thus the communication will be efficient. Similar operating system will enable network component to have seamless communication procedures between the components, therefore, if the company should adopt the latest windows 8, this is because the operating system have the latest standardization
A storage device is the system where your computer stores and retrieves your data. Storage devices can be a hard disk drive, DVD, CD drives, Blu-Ray drives or flash drives. A computer can retrieve the data by being “commanded” to retrieve it from the storage area and retrieve it to your RAM. The RAM of the computer is your temporary memory where your data is inputted, and then processed and stored onto a storage device for permanent placement.