Describe Charles Babbage's role in the history of computer? (Chapter 1)

Q. Describe Charles Babbage's role in the history of computer?
Ans:

Define computer?Give examples of computer applications. (Chapter 1)

Q:Define computer?Give examples of computer applications.
Ans:Computer is an electronic device that solves the problems according to the given instructions. Computer inputs data and derive useful information from it after processing. This information can be stored permanently and uses for different purposes.
The use of computer is so common now that everyone is taking advantage using this technology. Computer is being used in every field of life. Commonly used machines include computer chips. For examples micorwave ovens,automobiles and even wrist watches use computer chips. These computer chips have programs that are used to control different tasks of these machines.
Computers are available in different shapes and sizes. A commonly used computer systems is as under:

Computer Applications:
Following are different examples of computer applications.

• Printing of books.
• Controlling air planes.
• Landing of air planes.
• Switch on lights on specified time.
• Inventory management.

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Free Download INPAGE URDU 2000

Free Download INPAGE URDU 2000

Computer Science Notes for 9th Class

Computer Science Notes for 9th Class

Now you can download and study the study notes of computer science subject for 9th class relevant to Punjab Text Book Board ,Lahore.

These notes have been very helpful and famouse for their outcome with respect to students results. Many of the students have been studying these very precise and comprehensive notes for their exam preparation. These notes are not demanding any extra effort, these notes will help you to prepare for exam in a very short time interval. Even a study of 5-6 days can be enough to succeed in exam. Most of the questions are part of previous years exam and have a good ranking in question bank.

After downloading the notes, open them in Adobe acrobat reader or Foxit reader. If you have not installed this software then install it.

What is a Variable

What is a Variable

Variable is a named memory location. A location in memory that has a name and used to store data. Following is a well composed definition of variable in urdu language for the students whose second language is English. If a concept is understood properly in mother language then it is very easy to make it clear in second language like English. 

What is a Variable

This definition has been composed with respect to the concept of variable , in particular from c language perspective.

Computer Coding Schemes

Computer Coding Schemes

• BCD-Binary Coded Decimal

Short for Binary Coded Decimal, BCD also called as packet decimal and is numbers 0 through 9 which are converted to four-digit binary. Following  is a list of the decimal numbers 0 through 9 and the binary equivalents.

• Decimal	BCD
  0	0000
  1	0001
  2	0010
  3	0011
  4	0100
  5	0101
  6	0110
  7	0111
  8	1000
  9	1001

  Having Used this conversion, the number 25, for example, would have a BCD equivalent number of 0010 0101 or 00100101. However, in binary, 25 is represented as 11001.
   
• EBCDIC-
• ASCII-American Standards Code for Information Interchange
• Unicode