paper presents a comparative study of the performance of three operating systems that run on the personal computer architecture derived from the IBM-PC. The operating systems‚ Windows for Workgroups (tm)‚ Windows NT (tm)‚ and NetBSD (a freely available UNIX (tm) variant) cover a broad range of system functionality and user requirements‚ from a single address space model to full protection with preemptive multi-tasking. Our measurements were enabled by hardware counters in Intel’s Pentium (tm) processor
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X is a powerful development platform; it supports multiple development technologies like UNIX‚ Java‚ Cocoa and Carbon. It also is host to many open source‚ web‚ scripting‚ database and development technologies. It was build around the integrated stack of graphics and media technologies such as QuickTime‚ Quartz‚ Core Image and Core Audio. Mac OS X is based on the Mach Kernel and the BSD implementation of UNIX which were originally incorporated into the NEXTSTEP operating system. Many aspects of the
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The Ming Dynasty The Ming Dynasty was a very influential dynasty that brought new people‚ art‚ and ideas to China. Art is now starting to influence many citizens. The money to follow such arts is coming from trade‚ which China is skill in trading. This brings many new people to China. The Ming brought along a prosperous era for China The Ming was a dynasty that had greatly influenced art and trade. In fact‚ they were almost on top of trade. “Lui Chin‚ when he was finally disgraced in 1510‚ his
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and the cost to operate these in the traditional sense comes at a very high cost. The solution is to migrate to a Linux/Unix solution; this can potentially drop total cost of ownership by 77%. Since money is the driving factor in nearly all business decisions it is not hard to see the benefit of migrating to the open source solutions. One of the many advantages to Linux/Unix running on the mainframe is that organizations can significantly reduce the time-to-market of new IT solutions and services
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Group ID (GID)‚ User ID Info‚ Home directory‚ Command/shell. 9. fstab is a system configuration file on Linux and other Unix-like operating systems that contains information about major filesystems on the system. a. Device name: This is the UNIX filename representing the physical device or partition. Typically‚ this name starts with /dev. b. Mount point: This is the UNIX filename on the directory structure where the device or partition is to be mounted. c. File system type: This field represents
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Assignment 1Input device (keyboard and computer stress injury) | November 18 2011 | Q1. How are keys pressed on a keyboard interpreted correctly by the computer? (How does a keyboard communicate with the CPU?) Q2. Describe common keyboard shortcuts that you can use (using the keyboard modifier key‚ and function key) to ease every day computing operations? Q3. How can you
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number of results a system that doesn’t meet the minimum memory requirement of the NG Scoring tool (256MB) The NG tool by default sets a maximum heap size of 256MB. The directions below describe how to increase this value on UNIX and Windows systems. Solution: For UNIX systems: When running the tool include the heap space argument ’-Xmx’. For example: ./ng.sh -Xmx512m Where ’-Xmx512m’ sets the maximum heap size to 512MB of memory. Higher values may be used where additional memory
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supports standard SQL * MySQL compiles on a number of platforms * MySQL is free to download and use PHP + MySQL * PHP combined with MySQL are cross-platform (you can develop in Windows and serve on a Unix platform) Why PHP? * PHP runs on different platforms (Windows‚ Linux‚ Unix‚ etc.) * PHP is compatible with almost all servers used today (Apache‚ IIS‚ etc.) * PHP is FREE to download from the official PHP resource: www.php.net * PHP is easy to learn and runs efficiently
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generates lexical analyzers ("scanners" or "lexers"). Lex is commonly used with the yacc parser generator. Lex‚ originally written by Mike Lesk and Eric Schmidt and described in 1975‚ is the standard lexical analyzergenerator on many Unix systems‚ and an equivalent tool is specified as part of the POSIX standard. The structure of a Lex file is intentionally similar to that of a yacc file; files are divided into three sections‚ separated by lines that contain only two percent signs‚
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Software is a general term. It can refer to all computer instructions in general or to any specific set of computer instructions. It is inclusive of both machine instructions and source code (more human-understandable instructions that must be rendered into machine code by compilers or interpreters before being executed). On most computer platforms‚ software can be grouped into a few broad categories: software is the basic software needed for a computer to operate. software refers to one or more
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