This is the storage device where the data and instructions fed by the user are stored.
The computer memory is classified into
When the power goes off.
It consists of RAM and ROM main memories.
Series of bytes represent data or instruction
E.g. (Personal Digital Computer Assistant)
Processing is done on continuously varying signals.
They are small in size and do not have large storage capacities. The length of a microcomputer lines in the range 8-32 bits
E.g.: IBM PC, PS/2
It is used by small and mid-size business organizations.
They are used in research organizations, large industries, and large business and government organizations
They consume more electricity
E.g.: IBM 3000 series, UNIVAC 1180
They can handle very large data bases or a great amount of data computation.
They can perform one trillion operations per second.
Used in the field of science and defense, designing and launching missiles, weather forecasting, biomedical research
Highest processing speed for at a given time.
E.g: CRAY-3, HITAC S-300
transactions, publishing etc.
It does not possess any intelligent for analyzing the problem.
a. Memory Management:-Allocating memory to the running program and reallocating when they are terminated
b. Processor Management:-Processing of jobs, deciding on the job scheduling technique and how a job to be processed longs.
Releasing the processor when the jobs are terminated.
c. Device Management:-Allocating the input and output devices to the running processes and reallocating them when processes are terminated.
d. File Mnagement: - Manging the file systems in terms of where the files are stored, their status and memory locations, opening and closing the files, providing access permission to the files.
E.g. of operating system are DOS, UNIX, WINDOWS NT, LINUX
8. Differentiate between WINDOWS and LINUX operating systems.
Software is a set of programs which direct the various hardware components.
It acts as an interrupt between the hardware application programs and the user
-A network operating system allows computer to communicate and share data across a network while controlling network operations and overseeing the network’s security
-A utility is a program that makes the computer system easier to use or perform highly specified functions