Chapter 4 Storing Data and Information

Chapter 4 Storing Data and Information - 7/28/2009...

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7/28/2009 1 Black & White Busines Computing 2010 Chapter 4 Storing Data & Information Computer Information Systems 105 Storing Data & Information Data Storage Computer storage is the variety of ways a computer system can store (save) data and information. Stored information includes spreadsheets, documents, graphics, software, drivers, or any of the hundreds of file types used by a computer. Arizona State University W. P. Carey School of Busines Computer Applications & Information Technology There are two main types of storage; primary storage and secondary storage . Primary storage can be analogized as what a user is currently working on and secondary storage is where the user stores their work when they are finished. Black & White Busines Computing 2010 Chapter 4 Storing Data & Information Computer Information Systems 105 Storing Data & Information Data Storage Random Access Memory ( RAM ) is primary storage that is temporary and volatile . RAM is a type of storage that allows stored data to be accessed in any order without physical movement of the storage media or device. Arizona State University W. P. Carey School of Busines Computer Applications & Information Technology Secondary storage is non volatile which means it retains its data and information even after the computer system is turned off. Secondary storage memory is not directly accessible to the central processing unit (CPU) of the computer so it needs to make use of input/output channels. Black & White Busines Computing 2010 Chapter 4 Storing Data & Information Computer Information Systems 105 Storing Data & Information Ones and Zeros Microcomputer systems are binary . Binary means something is made up of two parts, and in this case, either a “1” or a “0”. When a user inputs data or information into a computer system, regardless of content, it is always converted into ones and zeros so the computer can work with it.
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Chapter 4 Storing Data and Information - 7/28/2009...

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