Question

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Answer 1

Answer:

1. A computer system is a set of integrated devices that input, output, process, and store data and information. Computer systems are currently built around at least one digital processing device. There are five main hardware components in a computer system: Input, Processing, Storage, Output and Communication devices.
2. A barcode reader (or barcode scanner) is an optical scanner that can read printed barcodes, decode the data contained in the barcode and send the data to a computer. Like a flatbed scanner, it consists of a light source, a lens and a light sensor translating for optical impulses into electrical signals
3. the programs and other operating information used by a computer
4. personal area network (PAN) is formed when two or more computers or cell phones interconnect to one another wirelessly over a short range, typically less than about 30feet.

Q. 2-1Site (software ) licences are likely to be cheaper than buying several standalone licences. Files can easily be shared between users. Network users can communicate by email and instant messenger . Security is good - users cannot see other users' files unlike on stand-alone machines.

2-Utility programs, commonly referred to as just "utilities," are software programs that add functionality to your computer or help your computer perform better. These include antivirus, backup, disk repair, file management, security, and networking programs.

Explanation:

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