...Comparison of Windows, Mac OS X and Linux Operating Systems Team A POS/355 March 6, 2015 Memory Management System Memory management is the process of allocating memory during your programs runtime. Memory Management in MAC OS is a multi-core and multi-processor execution that is supported and a programming API, which is called grand central dispatch. It is in the MAC OS. It provides a pool of available threads. There are ways to prevent memory related problems; Freeing data that is still in use, this can cause memory corruption that can result in your application crashing or worse corrupted user data. The MAC operating system can provide most concurrency as possible based on the number of cores available, and those threads depend on the capacity of the system. Windows memory management system is both physical and has virtual memory. It is mainly controlled by the virtual memory managers and pages. “Windows operating system operates on many platforms then it uses page sizes that can range between 4KB to 64KB. So this means that windows virtual memory can control how memory can allocate paging performance” (Stallings, 2013). Committed, Available, and Reserved are three types of regions of space or memory that the operating system can manage. Committed region is space it’s pages that have been stored either in physical or virtual memory. It also allows the process to access the virtual memory pages. Available region is where the address of the process is not being used...
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...UNIX®/Linux® versus Mac® versus Windows® POS/355 October 29, 2012 Carol S. Eichling UNIX®/Linux® versus Mac® versus Windows® There are several computer operating systems available on the market, and it is sometimes difficult to choose. Therefore, it is important to compare the system capabilities to make the decision easier. The three biggest players in the operating systems market are UNIX®/Linux®, Mac®, and Microsoft® Windows® with Windows® holding the largest market share (Boitor & Brătucu, 2011). These three operating systems are capable of multi-processing and have similar capabilities; however, and it is important to compare and contrast how they handle memory management, process management, file management, and security, which are critical system functions. Discussing memory management, which is a vital component in operating systems, is first. Memory Management Memory management refers to the way a system makes use of the computer’s RAM (Random Access Memory). Many of the operating systems in use on computer systems have positives and negatives in their use of memory attributes. “Memory management is usually divided into three areas: hardware, operating system, and application…although the distinctions are a little fuzzy. In most computer systems, all three are present to some extent, forming layers between the user's program and the actual memory hardware” (Ravenbrook Limited, 2001, p. 1). There are several types of memory, including main memory, file system...
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...Operating systems need a way to be able to allocate and de-allocate memory within the sectors of the RAM using the Kernel. However, every operating system handles this very differently. Let’s take a look at the differences between the three major operating systems and how they each manage its memory. We begin by analyzing UNIX/Linux. Linux, a form of UNIX, is very different in how it manages its memory to the other operating systems. Linux uses a tree like structure for memory management, and also using a numeric algorithm to make the best use of its valuable memory. The memory it manages is maintained in structures which enable protection of them by converting the list into the tree like structure. The tree is also balanced and not too much in depth. This helps for the information to be reached much more easily because it is closer for the processor to grab and use. It also cuts the time it takes for the processor to reach the data that would otherwise take longer to reach. The Virtual Address Descriptors marks the nodes within the tree as reserved, committed, or free. MAX OS works in a similar fashion to UNIX. Each task created within the MAC operating system has its own memory map. Within the operating system, the memory map mentioned before takes a form in to what it looks like an ordered doubly linked list. The objects within the linked list contain lists of pages as well as references to other objects. There really is not a need to be able to ever access the memory...
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... Kym Harris | 4/26/2014 | | Introduction Microsoft Windows, Apple Macintosh, and Red Hat Linux are the most popular operating systems used today. All three platforms have pros and cons, but many users struggle to find the right OS to serve their computing needs. While Macintosh and Linux seem to be impenetrable to viruses, Windows suffers a great deal from such intrusions. On the other hand, users find Windows to be easier to navigate than the other two operating systems. Macintosh, operating on the Apple computer platform is very expensive in comparison to the Windows platform, while Red Hat Linux is completely free and offers much of the same features as any of the others. The biggest advantage of a Windows platform is its ability to be compatible with almost every application, driver, or game available. Of course, Macintosh does not offer this same level of compatibility, as very few programs will run on this platform. Linux can be installed on any computer except Apple, and more flexibility and options than any of its competitors. Microsoft Windows Historical Background * 1981- Microsoft released its first operating system, Microsoft Disk Operating System (MS-DOS). Initially created for IBM computers, Microsoft was able to sign a deal that allowed them to license this product to other companies. MS-DOS used command line instead of the graphical user interface most of us are used to today. * 1985- Windows 1.0 was shipped to its first customer. This OS incorporated...
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...Contrast and Comparison of Operating Systems Team B will take what we have learned from our course POS/355 Operating systems and research to compare and contrast the UNIX/Linux, Microsoft Windows, and MacOS systems. In particular we will contrast and compare the different operating systems in regards to memory management, processing, file management and security. Operating systems at the core is all about the kernel. The kernel in all of the operating systems is the main component that is responsible in the management of memory, processing, file management and security. Contrast and Comparison of Memory Management within Operating Systems Memory management in comparison and contrasts between the different operating systems is due to the way the kernel works in conjunction with the memory. Since each operating system has different kernel’s they each have similar and different ways that they manage memory. Contrasts and comparisons on Mac OS, Windows, and UNIX/Linux are described below. 1. UNIX: Though UNIX and Linux are extremely similar when it comes to how things work internally; there are slight differences that make UNIX distinct from its counterpart. One process that UNIX utilizes is known as swapping; this is done by moving chunks of the Virtual Memory (called pages), out of the main memory and moving others in. In order for this process to work at its best, those pages that are needed must be accessible in the Main Memory at the demand of the CPU. When a page is...
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...Three operating system – Windows, Mac OS X, and Linux- dominate the world of computing today. Windows is the most popular out of the three with having 90 percent of the operating market share. It is in Commercial buildings, Industrial facilities, as well as home computer. Widows, having been introduced in 1985, is a very mature and complete piece of software. Yet, it has its flaws. Apple’s Macintosh OS is even older than Windows. It’s the first successful graphical-based OS, It was released a year before it’s Microsoft counterpart. Linux has the unlikely origin of being the hobby project of finnish university student Linus Torvalds. The Linux kernel was first released independently in 1991. But what really sets them apart? Each operating...
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...UNIX/Linux versus Mac versus Windows Rough Draft Annette Freshwater, POS355 November 4, 2013 Alicia Pearlman UNIX/Linux versus Mac versus Windows Final In today’s world of technology creation, development, and enhancement there are key factors to take into consideration. The choice of operating systems can determine the software and hardware utilized, the applications of the devices or programs, and determines the demographic, which will use the products. However the ever-changing field of technology has become more user-friendly, compatible, and more accepted in main stream than before. The main operating systems employed today are as follows: UNIX/Linux, Mac, and Windows. We will explore the various aspects of key components in these operating systems, memory, process, and file management along with the security of each system. The comparison of each system will determine the operating system best suited for the needs of our creations, projects, and improvements to the technology of the past, present, and future. MEMORY MANAGEMENT Memory management in multiprocessor systems is essential in executing several processes simultaneously. The multitasking of a system aids the user in accomplishing his or her task more efficiently than with a single processor system, which is important in the current climate of today’s multifaceted mix of professional and personal world. Why choose UNIX/Linux, Mac, or Windows to develop a device, product, or program? The...
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...POPULARITY AND USAGE STATISTICS OF DIFFERENT OPERATING SYSTEMS Submitted by: Bendicion, Divine Grace L. BSCS 3 Submitted to: Prof. Efren Semacio Instructor, Operating Systems Quality of Research (30%)…..…. | ------------------------------------------------- ------------------------------------------------- | Writing Quality (20%) ……….….. | ------------------------------------------------- ------------------------------------------------- | Analytical Strength (30%)….…... | ------------------------------------------------- ------------------------------------------------- | Effort (10%)……………….….…... | ------------------------------------------------- ------------------------------------------------- | References (10%)………….……. | ------------------------------------------------- ------------------------------------------------- | TOTAL ………………………….... | ------------------------------------------------- ------------------------------------------------- ------------------------------------------------- | OVERVIEW AND DATA PRESENTATION A survey over the internet, specifically through Facebook, was done by the researcher from November 28, 2011 to December 2, 2011 to determine the popularity or usage statistics of certain operating systems. A picture with operating systems logos was posted by the researcher including the question “Which operating system do you prefer to use and why?” During this timespan, 71 respondents posted their answers...
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...UNIX /Linux versus MAC versus Windows Paper POS/355 March 11, 2013 Bhupinder Singh UNIX/Linux versus MAC versus Windows Paper Introduction Today we live in a world where technology is the way to go. Even in this century there are people that are still clueless on the operating system. It is different, exciting when a new and advance system comes out. But some of us are so confused when it comes to the basics of new technology. Operating systems are programs which manages the computer’s hardware. The systems provide a basic for the applications programs between the computer user and its hardware. When looking, there are so many different types of operating systems that are available. The four main operating systems that are used are Windows, Mac, UNIX, and Linux. For every computer there are many different items that make the system a whole. When it comes to the different operating systems there are different features available, even though when you think of computers a person might think security will all be the same but there are difference between each one. As you read more you will understand the security and the difference between a MAC, UNIX/LINUX and Windows systems and how each one works. Access control goal is to protect a resource from unauthorized access while facilitating seamless and legitimate use of such resources. Presently, each day users hold the need to access to those resources through a broad line of devices...
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...important part. The operating system is generally a part of a larger network controlled by servers and other devices. There are three types of operating systems and they are Windows, Mac OS, and Linux. Windows, Mac OS, and Linux all function the same but are used and structured differently. Windows is regarded as the most user-friendly operating system available but compared to Mac OS and Linux it is much more at risk for security threats. Windows is currently being used by 80-90% of all computers and has a large hardware support. Although windows sound’s good it is also not good on security such as viruses, spyware, malware, gradual performance decay, and BSOD (Blue Screen of Death). Mac OS is based on Darwin and is less capable of getting viruses because of its design (UNIX) in which it is safer than windows. Mac OS is the proprietary operating system and can only be run on systems built by apple. Page 1 of 2 NT1110: ELIAS GONZALES_MODULE1_LAB.DOC Linux is an operating system that is an open source and has GPL (General Public License). Linux is meant to run on PCs, gaming consoles, DVR’s, Mobile Phones, and many other devices. With Linux you can create, modify, and redistribute any software freely. The differences between each operating system’s are Memory Management, Process...
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...the basic understanding of this new technology. The area people need to start when trying to understand the basics of any computer hardware system would the operating system. Operating systems are a program which manages the computer’s hardware. These systems provide a basis for application programs and intermediate between the computer’s user and its hardware. There are many different types of Operating serves that are available to use. There are four main Operating systems that are used in today’s Technological world: UNIX, Linux, Mac, and Windows. Each one of these systems has its own unique aspects to offer users, while still sharing the same basics that an operating system needs. Memory Management UNIX/Linux In comparison to other operating systems, UNIX is quite different when it comes to managing its memory. It uses extremely sophisticated memory management algorithms to make the best use of memory resources. Though UNIX and Linux are extremely similar when it comes to how things work internally, there are slight differences that make UNIX distinct. One process that UNIX uses is Swapping; this is done by moving chunks of the Virtual Memory, known as pages, out of the main memory and moving others in. In order for this process to work at its best, those pages that are needed must be accessible in the Main Memory at the demand of the CPU. When a page is expected to be needed in the very near future it is called a resident set. This can lead to errors due...
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...|[pic] |Syllabus | | |College of Information Systems & Technology | | |POS/355 Version 9 | | |MU12BIT08 | | |Introduction to Operational Systems | | |Wk 1 June 10 | | |Wk 2 June 17 | | |Wk 3 June 24 | | |Wk 4 July 01 | | |Wk 5 July 08 ...
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...there are people that are still clueless on the operating system. It is different, exciting when a new and advance system comes out. But some of us are so confused when it comes to the basics of new technology. Operating systems are programs which manages the computer’s hardware. The systems provide a basic for the applications programs between the computer user and its hardware. When looking, there are so many different types of operating systems that are available. The four main operating systems that are used are Windows, Mac, UNIX, and Linux. For every computer there are many different items that make the system a whole. When it comes to the different operating systems there are different features available, even though when you think of computers a person might think security will all be the same but there are difference between each one. As you read more you will understand the security and the difference between a MAC, UNIX/LINUX and Windows systems and how each one works. Access control goal is to protect a resource from unauthorized access while facilitating seamless and legitimate use of such resources. Presently, each day users hold the need to access to those resources through a broad line of devices, such as PCs, laptops, PDA, smartphones and kiosks. Most organizations need to provide protection for their files and allow the correct people to access. The fundamental goal of an Access management system is to maintain confidentiality of user information...
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...applications. Like in a work place the boss makes sure production is at the right pace for employees and employers. The operating system also provides a consistent application interface. This allows a software developer to write on one computer and be confident it will run on different computer of the same type. The three most used operating systems are Windows, Linux, and Mac OS X. The operating systems have the same function on all computers. Which is allows the user to have an interface but there are differences between them and here are five of them. The first is that Microsoft Windows and Apples Mac OS X operating codes are protected so you have to buy specific software for them. Linux is a free operating system and anybody can change the code or write software for Linux freely. The second difference is the security of the operating system. Windows has a lot of users and programs so hackers tend to focus more on windows operating systems and create more viruses. Jeffrey Miller June 24 2014 pg2 Mac has...
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...Mac Memory Management For rough draft Mac OS is available on two processor architectures: the Motorola 68k series and the PowerPC. Mac OS has a flat address space, shared between all processes. There is no per-process memory protection. Application code runs in supervisor mode, so there is no instruction protection. Mac OS has virtual memory, in the limited sense that a larger fixed address space can be simulated, by storing the entire address space on disc. This size of this address space is fixed at boot time. The lowest part of memory is occupied by the system partition. This contains some system global values which applications should not access directly, although there is nothing to prevent them doing so. Historically, the Mac OS used a form of memory management that has fallen out of favor in modern systems. Criticism of this approach was one of the key areas addressed by the change to OS X. The original problem for the engineers of the Macintosh was how to make optimum use of the 128 KB of RAM that the machine was equipped with. Since at that time the machine could only run one application program at a time, and there was no fixed secondary storage, the engineers implemented a simple scheme which worked well with those particular constraints. However, that design choice did not scale well with the development of the machine, creating various difficulties for both programmers and users. References: The Memory Management Reference Memory management in Mac OS, en...
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