What is an** Operating System (OS)**?
ex: Windows (Microsoft), macOS (Apple), Android (Google), iOS (Apple for iPhone).
A system software that manages computer hardware and software resources, acting as an intermediary between the user and the computer’s hardware and applications.
What is a Single-User, Single-Task Operating System?
An OS that supports only one user and one application at a time.
ex: Palm OS (used in older mobile devices and PDAs).
What is the main function of an operating system?
- Most Important piece of software
- Allows user interaction with the machine
- Controls the operation of the computer including:
- Communication with the hardware. Such as input and output.
- Controlling the software that is running
→ Every mobile and personal computer has an OS
What is a Single-User, Multi-Task Operating System?
An OS designed for one user at a time but capable of running multiple applications simultaneously.
ex: Windows, macOS, iOS, Android.
What is a Multi-User Operating System?
An OS that allows multiple users to access and use system resources at the same time. It is used in In servers, supercomputers, and mainframes.
ex: UNIX
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1. Digital Devices24
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2 - Digital Devices - Uses24
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3 - Input, Output & Storage Devices19
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4 - Data Processing & Accessibility Devices.14
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5. Operating Systems5
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6. Operating Systems - Roles.12
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7. Performance of Operating Systems18
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8. Application software (1)20
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9 - Choice of Softawre5
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10. Application software (2).16
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11. Open Source vs Proprietary4
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12 - Emerging Technologies14
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14 - Factors Affecting the Choice of IT System10
