This
is the first week of Introduction to Information
Technology class where first day we introduce our self and our lecture told
us about Course Outline, Assessment and lecture’s information. So in this week I
learned about the difference between data and information, and problems
associated with information management but before this we go through the
following topic like what is computer? Types of computer, Generation of
computer so on. In my view Computer is collection of
devices that function as a unit. It’s an electrical device which is provided
faster methods of communication. Computer has played a significant role in the
communication system today. The most basic collection includes a computer CPU
(Central processing Unit), a mouse, a keyboard, and a monitor.
The basic operations of computer:
Computers
perform basic types of operations: Input, Output, Processing, Storage, these
four operations characterize everything that computers do.
Input:
Computer input is whatever is typed, submitted or transmitted to a computer
system. It's the collection letters, numbers, images etc.
Output:
output is the result produced by a computer. It’s including reports, documents,
music, graphs, and pictures.
Processing:
Process is the operation of data as per given instruction. it is totally
internal process of the computer system.
Storage:
Storage is the process of keeping information on a computer.
Similarly
week one contained generation of computer. Generation of computer is not as long as human
generation as it is man-made device. Generally there are five generation of
computer as mentioned under.
First Generation: first
generation was used form 1940-1950, it use vacuum tube were used in this
generation of computer. This generation of computer were large in size a bit
noisy and its speed is very low. The storage capacity of first generation is
also very low. The storage capacity of first generation is also very low. They
were used for specific purpose. 
Second
Generation: second generation computer was made on
use from 1950-1964; Vacuum tube was replaced by Transistors in second
generation computer. Though it is more reliable third generation computer
established in 1964-1974 and transistor was replaced by Integrated Circuit
(IC). 
Third Generation: The third generation computer was more faster, reliable
and its storage capacity is more than first and second generation computer.
Fourth Generation: Similarly fourth generation
computer is established in 1974 and it is still using process. Very large
Scale Integration and Ultra Large
Scale Integration are used in this generation of computer. Fourth
generation of computer are more reliable and comfortable to use as it as more
storage capacity, speed is higher than past generation of computer.
Fifth Generation: Last but not the list, fifth generation of computer is in the
construction process, it is not completed yet. It will be much faster than past
generation computer and it will use natural language.
Categories of Computers : we can categorize on basic of size, capability, speed
and price. They are as under:
- Embedded computers
- mobile computers
- Personal computers
- Mid range computers
- Super computers
- Mainframes
- Hybrid computers
Normally all these above computer have their own purpose and they are
different from each other with their unique purpose. Embedded computers is use
for specific purpose. Example CCTV, traffic light etc. Mobile computers are
used for computing and internet purpose. Example your self phone. Personal
computer is our desktop which is used for our private purpose. More over Mid range computer used for hosting data
and programs available to small group of users. Mainframe computer are used for
the large company or large industries. Mainframe computer are so large in size they required large number of users to
operate them. Super computer, this computer are used for scientific and
research purpose they are the fastest computer. The good example of this
computer are those computer used far and to fly rocket in the sky etc. lastly
hybrid computers which is combination of computers that are capable of inputting and outputting in both digital and analog signals. For example webcam,
telephone, mobile etc.
Week one further contains about
difference between data and information.
