The document is an introductory course on information technology, hardware, and networking taught by Wasim Ahmad Khan at Govt. Dyal Singh College Lahore, Pakistan. It defines key concepts such as data, information, technology, and information technology. It then describes computers as machines that accept input, store and process data, and output results. Computers are composed of hardware and software - the physical and program components. Software includes programs, which are sequences of instructions, and data, which is the information processed by programs.

1. (1st Week)
Information Technology
Hardware & Networking Course
by
Wasim Ahmad Khan
Govt. Dyal Singh College Lahore, Pakistan

2. What is Data?
 Data: Raw facts, figures, and some details.
Hardware & Networking Course
Wasim Ahmad Khan
Govt. Dyal Singh College Lahore, Pakistan
www.MultiLiber.com

3. What is Information?
 Information: An organized, meaningful, and
useful interpretation of data.
Hardware & Networking Course
Wasim Ahmad Khan
Govt. Dyal Singh College Lahore, Pakistan
www.MultiLiber.com

4. What is Technology?
 Technologies are artificial instruments, processes
or systems that extend our natural capabilities.
– e.g: Scanner, Fax, Printer.
Hardware & Networking Course
Wasim Ahmad Khan
Govt. Dyal Singh College Lahore, Pakistan
www.MultiLiber.com

5. What is Information Technology?
 Information Technologies extend natural forms of
representing and communicating information to
incorporate artificial and external forms
– e.g: writing, the printing press, telephone
Hardware & Networking Course
Wasim Ahmad Khan
Govt. Dyal Singh College Lahore, Pakistan
www.MultiLiber.com

6. Computers
 Computers are electronic machines that
– accept data & instructions from a user (INPUT)
– store the data & instructions (STORAGE)
– manipulate the data according to the instructions
(PROCESSING)
– store &/or output the results to the user (OUTPUT)
Hardware & Networking Course
Wasim Ahmad Khan
Govt. Dyal Singh College Lahore, Pakistan
www.MultiLiber.com

7. Computers
 A computer system is composed of hardware and
software.
 Hardware components are the physical, tangible
pieces that we can see and touch.
 Software is the program and other operating
information used by a computer.
Hardware & Networking Course
Wasim Ahmad Khan
Govt. Dyal Singh College Lahore, Pakistan
www.MultiLiber.com

8. Software
 Program
– a sequence of instructions to accomplish a result
– a computer processes information under the direction of
a program
 Data
– information to be processed by a program
 Example
– Data: for each employee, the employee number, hours
worked & hourly pay rate
– Program: instructions on how to process the data to
produce pay cheques, payroll register, etc.
Hardware & Networking Course
Wasim Ahmad Khan
Govt. Dyal Singh College Lahore, Pakistan
www.MultiLiber.com

9. Thanks
www.MultiLiber.com