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A computer is a device that can be instructed to carry out arbitrary sequences of arithmetic or logical operations automatically. The ability of computers to follow generalised sets of operations called programs enables them to perform an extremely wide range of tasks.
<p>An operating system (OS) is system software that manages computer hardware and software resources and provides common services for computer programs. Time-sharing operating systems schedule tasks for efficient use of the system and may also include accounting software for cost allocation of processor time mass storage printing and other resources. Operating systems are found on many devices that contain a computer – from cellular phones and video game consoles to web servers and supercomputers.An information system (IS) is an organised system for the collection organisation storage and communication of information. More specifically it is the study of complementary networks that people and organisations use to collect filter process create and distribute data. The term is also sometimes used in more restricted senses to refer to only the software used to run a computerised database or to refer to only a computer system.
The book is a handy guide for anyone looking to increase their understanding about the basics of computing and the softwares designed to help execute tasks digitally.
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