Ch1 Introduction Flashcards
CD-ROM stands for
Compact Disk Read Only Memory
Control Unit (CU) is
the unit that controls and coordinates all other computer components
Factors to consider when you buy a computer:
- Size of the RAM
- Speed of the CPU
- Size of the hard disk
“End user” is used to describe
people who use computers to perform information processing tasks
Super computers
the largest computers, used mainly for research
Data
a software that performs tasks like word processing or database management
System software
is a software used to interact between user programs and the computer
Microcomputers are divided into two general categories:
- Portable
2. Desktop
Temporary, or volatile, storage is also known as
RAM
The most common input hardware for personal computers are
Mouse
Keyboard
The two main parts of the system unit are:
- CPU
2. Memory
The number of bits in a byte is
8
The computer is a
(1) a collection of electronic circuits and devices
(2) an intelligent machine
(3) a combination of hardware and software
The information should be:
- Must be available at the right time and useful
2. Should have a good accuracy
CPU refers to
Central Processing Unit
CU (Control Unit) is used to
control the processes in the CPU
CPU consists of:
- ALU 2. Registers 3.CU
The Main Memory
(1) could be temporarily or permanent
(2) is used to store user programs and data while running
The Magnetic Disk
is classified as a secondary storage
Micro-computers example
laptops
The computer virus has the ability to
link itself to other programs
The sound blaster is
an output unit only
Microcomputers
The smallest computers, used mainly for personal use
RAM is a
memory unit that store information where you can write to it, or read from it
Computer viruses are
programs written to damage other software programs
Input units examples:
- Keyboard
- Mouse
- Scanner
Every letter requires _______ byte to store the word
1 byte
1 byte = ?? Bits
8
RAM is a part of
the system’s hardware
The most widely used type of computer is the
micro-computer
Another name for the keyboard, mouse, monitor, and system unit is
Hardware
Secondary storage examples:
- Floppy disks
- DVDs
- Hard drives
One major difference between primary and secondary storage is
primary storage is temporary, secondary storage is permanent
The ALU performs
arithmetic and logical operations
All the information used by the processor is loaded first into
RAM
Pointing devices examples:
- A mouse
- Touch screen
- Trackball
is the general name for devices that convert machine-readable information into people-readable form
Output devices
a specialized output device for producing charts, maps, and very high quality drawings
Plotter
The computer may be infected with a Virus because these two reasons:
- Download files from internet
2. Using infected Disk
The maximum capacity for floppy diskette is
1.4 MB
