CODIANS

An Operating System (OS)     is an interface between a computer user and computer hardware. An operating system is a software which performs all the basic tasks like file management, memory management, process management, handling input and output, and controlling peripheral devices such as disk drives and printers. Some popular Operating Systems include Linux Operating System, Windows Operating System, VMS, OS/400, AIX, z/OS, etc. Definition An operating system is a program that acts as an interface between the user and the computer hardware and controls the execution of all kinds of programs. Following are some of important functions of an operating System. Memory Management Processor Management Device Management File Management Security Control over system performance Job accounting Error detecting aids Coordination between other software and users Memory Management Memory management refers to management of Primary Memory or Main Memory. Main memory is a large array of word...

  Data   are units of   information , often numeric, that are collected through observation.   In a more technical sense, data are a set of values of   qualitative   or   quantitative   variables   about one or more persons or objects,   while a   datum   (singular of   data ) is a single value of a single variable. Some of the different types of data. Although the terms "data" and "information" are often used interchangeably, these terms have distinct meanings. In some popular publications, data are sometimes said to be transformed into information when they are viewed in context or in post-analysis.However, in academic treatments of the subject data are simply units of information. Data are used in  scientific research , businesses management (e.g., sales data, revenue, profits,  stock price ),  finance , governance (e.g.,  crime rates ,  unemployment rates ,  literacy  rates), and in v...