DCA
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What is DCA?
DCA :- Diploma in Computer Application. in DCA, you will get to learn about DOS, Ms office package , details about computer generations , Basic Internet knowledge and little more.
What is computer :-
A Computer is an electronic machine that can solve different problems, process data, store & retrieve data and perform airthematic and logical operations at high speed and efficiently than humans”
In other words, A Computer is programmed device with a set of instructions to perform specific tasks and generate results at a very high speed.
Meaning of the word "Computer" :-
Computer is derived from a Latin word “computare” which means to “to calculate”, “to count”, “to sum up” or “to think together”. So, more precisely the word computer means a "device that performs computation"
Note :-
According to Wikipedia the word “Computer" was first used in a book called “the Young mans gleanings” in 1613.
The first use of the word "computer" was recorded in 1613 in a book called "The young mans gleanings" by English writer Richard Braithwait. It referred to a person who carried out calculations, or computations. word continued with the same meaning until the middle of the 20th century.
COMPUTER
Full Form of Computer is “Common Operating Machine Purposely Used for Technological and Educational Research”. When computers were initially created in the middle of the 20th century, the phrase was first used.
C - Common
O - Operating
M - Machine
P - Purposely
U - Used for
T - Technological
E - Educational
R - Research
How do Computers work?
A computer is an electrical device that runs a collection of instructions known as software.
When a user send an instruction, the CPU (Central Processing Unit) executes it and pulls the necessary data from the RAM (Random Access Memory) or HDD (Hard Disk Drive).
The output is then shown on the screen.