![]() There are 3 main categories of translator used, AssemblerĪn assembler is a program that translates the mnemonic codes used in assembly language into the bit patterns that represent machine operations. Whatever language or type of language we use to write our programs, they need to be in machine code in order to be executed by the computer. It also allows the programmer to interact with proprietary software without having access to its source code. Using library programs saves time when programming. This includes things like making playlists, functions and procedures for accessing and manipulating the music library (which is a binary file) and playback routines. For example, it is possible to download and use a library of routines that can be used with Windows Media Player. Some library programs are provided within operating systems like Windows or along with development tools like Visual Studio. When you program using a run-time library, you typically add a reference to it either in your code or through the IDE in which you are programming. The libraries are run-time because they are called upon by running programs when they are needed. On a Windows system they usually carry the file extension dll and are often referred to as run-time libraries. Library programs are compiled libraries of commonly-used routines. Examples of utility programs include compression programs, formatters, defragmenters and other disk management tools. Utility programs tend to perform specific tasks related to the management of hardware. Others you buy or source in some other way. Some utility programs are bundled in with operating system software these days. By hiding the true complexity of the system from the user, the operating system makes it easier for ordinary people to make computers perform useful tasks. ![]() ![]() This refers to the way that, by clicking on icons and menus, or by typing in commands at a prompt, we get to interact with the computer hardware without having to understand its complexity. One role of the operating system is to provide a virtual machine. That platform is provided by the operating system. The programs that we want to execute, the applications that we want to use all require a platform on which to execute. The operating system is the software that allows you to operate the hardware. We use the term System Software for software which is primarily used to operate the hardware. The following diagram shows the way we classify software. Classification Of Software The Big Picture
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