Main types of computer memory include read-only memory (ROM), random-access memory (RAM), hard disks, floppy disks, CD-ROMs, and DVDs. Software is divided into system software, like operating systems, language processors, device drivers and utilities, which control internal computer operations, and application software for specific tasks. Common units for measuring memory are the bit, byte, kilobyte, megabyte, gigabyte and terabyte.

1. TYPES OF MEMORY …
Main Memory Secondary
Memory
ROM (Read
Only Memory)
RAM (Random
Access Memory)
HARD
DISC
FLOPPY
DISCS
CD
ROM’S
DVD’S
Memory
Units
8 Bits = 1 Byte
2^10 or 1024 bytes = 1 Kilo byte
or 1 KB
2^10 OR 1024 KB = 1 Mega byte or
1 MB
2^10 OR 1024 MB = 1 Gega byte or
1 GB
2^10 OR 1024 GB = 1 Tera byte or
1 TB

2. SOFTWARE
SSystem Softwares
(Software that controls
internal computer operations)
Application Softwares (Set of
programs necessary to carry out
operations for a specified
application.)
Operating
System
Acts as an
interface
between
user and
hardware
Language
Processor
It converts
our Program
into
machine
language.
Device
Drivers
Provide
interface
between
OS and
hardware.
Utilities
Perform
Housekeeping
functions.
E.g. virus
removal
Packages
General Utilities
softwares; mostly
software suites
Customized
Softwares
Tailor made
software
according to a
user’s need.
TYPES OF SOFTWARES …..