Computer as a System

Punched card is not associated with personal computers. A punched card is a piece of stiff paper that contains either commands for controlling automated machinery or data for data processing applications.

 Option (4) is correct.

Digital scanner is not a computing device.

Linux is an open source software which is assembled under the model of free and open-source software development and distribution.

Software is a set of computer programs used in a computer to perform tasks.

Dvorak is the fastest keyboard.

Computer hardware is the collection of physical elements that constitutes a computer system.

It only performs pheripheral functions and it uses a computer chip.

A touch pad (touchscreen) uses switch contacts placed under a plastic pad that can be inscribed with symbols. When pressure is applied to specific areas, the underlying contacts make connection, registering input. This is characteristic of resistive touch technology where two conductive layers with contacts are separated by a spacer. Punched cards use holes, soft keyboards are virtual interfaces, and mice use optical/trackball sensors.

UNIX is not an internet software, it is a family of multitasking, multiuser computer operating systems that derive from the original AT&T.

JAVA is not an application software; it is a programming language.

A CD-ROM is a peripheral output device that can store up to 650 MB of data. While hard disks store much more data, CD-ROMs were specifically known for this 650 MB storage capacity in their standard format. Floppy drives store much less (typically 1.44 MB), and hard disks are storage devices but are internal or external drives that store much more than 650 MB, making CD-ROM the best answer for this specific capacity specification.

Daisy wheel printer cannot print graphics.

The software of a system includes programs or instructions.

OMR stands for Optical Mark Recognition.