Computer Platform

Example of System Software

• Scientific Application

• Creative Suite

• Business Application

• Operating System

Designed to coordinate and control the overall operation of computer hardware and software .

• Kernel

• CPU

• Operating System

• Application Software

This is the textual user interface in which the user gives instruction to the computer by typing command

• GUI

• Command Interpretation

• Command Line Interface

• Shell

Manage the processes submitted to the system in such a manner so as to minimize the idle time of the various processors (CPU, I/O processors, etc.) of the computer system.

• Resource Manager

• Process Management

• Multiprogramming

• CPU Scheduling

Execution of two or more different and independent programs by the same computer.

When one program is waiting for I/O transfer; there is another program ready to utilize the CPU.

• Multithreading

• Multiprocessing

• Multitasking

• Multiprogramming

Use of I/O processors to improve the performance of a computer system was carried one step further by designing systems that make use of more than one CPU.

• Multiprogramming

• Multitasking

• Multithreading

• Multiprocessing

Mechanism to provide simultaneously interactive use of a computer system by many users in such a way

It uses multiprogramming with a special CPU scheduling algorithm.

• CPU Scheduling

• Timesharing

• Loosely Coupled Multiprocessing

• Process management

User-friendly interface that is much easier to learn and use than a command-line interface.

• GUI

• CMD

• CL

• CJL

Deals with securing the computer system against fires, floods, earthquakes, stolen disks/tapes, leading out of stored information by a person who has access to the information, and so on

• User Access

• Internal Security

• External Security

• Challenge Respond Method

In this approach, authentication involves verifying something that can only be known by an authorized user. Authentication of a user based on the password supplied

• Proof by knowledge

• Proof by Possession

• Proof by Property

• User Access