- A Computer is a device which allows you to
- Input raw data
- Perform Computations/Processing
- Store the data for retrieval
- Obtain desired information
- Characteristics of a Computer
- Speed
- Accuracy
- Storage and Retrieval
- Repeated Processing Capabilities
- Reliability
- Flexibility
- Low Cost
- COMPUTER TECHNOLOGY IS COMPLEX BUT BASED ON SIMPLE PRINCIPLE
- Instructions
- Input as Raw Data
- Output as Information
- Storage
- LET US HAVE A LOOK INSIDE
- What are the main components ?
i. Hardware
ii. Software
iii. Computing Environments
iv. Computer Limitations
v. Know more about Keyboard & Mouse
- Computing Environments
- Single user
- Multi user
- Networke
- Software:
A set of instruction (programs) that makes the hardware perform a particular set of tasks
Ø System Software (Operating Systems & Utilities)
o DOS, UNIX,LINUX, WINDOWS 98 / 2000 / NT , etc.
o Memory Management, File Management, Anti Virus etc.
Ø Application Software
o General Purpose:
Ms-Office, Lotus SmartSuite,Ventura
Ms-Office, Lotus SmartSuite,
o Language Compilers:
C, C++, Visual Basic, JAVA, Smalltalk, ASP, etc.
C, C++, Visual Basic, JAVA, Smalltalk, ASP, etc.
Ø User Designed Application Software Scientific, Business, Design, Marketing, Entertainment, etc.
- Networking
- What is networking?
- Classification of Network
- Goals of a Networking
Personal Computer
Single User System
Ø One user can work on it
Ø No efficient use of System
Ø Operating System like MSDOS, Windows 95/
Ø Windows 98 / Windows 2000 –Professional etc.
Resource sharing cannot be done
Multi User System
Ø More than one user can work on the system in time sharing mode
Ø Operating System like Unix, Linux , Windows NT, Windows 2000–Server etc.
Ø Resource sharing can be done
Ø Optimal utilization of resources
Networking
Ø What is a Network?
o A network is a group of interconnected systems which share services and interact with each other by means of a shared communication link
o These systems can be located anywhere
o Network is often classified according to its geographical size.
Classification of Network
The most common classification of networks are:
Ø Local Area Network (LAN)
Ø Wide Area Network (WAN)
Ø Metropolitan Area Network (MAN) (eg. A city cable network)
Mouse Pointer Forms
Ø
Form when changing height and width simultaneously
Form when changing a width of a field in a table I Form when inserting the text
Form when moving a field to a new position in the table
Form when application being executed or a wait state
Form when changing height and width simultaneously
Form when changing a width of a field in a table I Form when inserting the text
Form when moving a field to a new position in the table
Form when application being executed or a wait state
Computer Configuration: An Illustration
Ø Characteristic & Example
o Present day PC Family
§ Pentium i7/ i5/ i3/ IV
o Memory
§ 4 GB/ 2GB/ 1GB
o Microprocessor chip
§ Intel i7/ i5/ i3
o Clock Speed
§ 2.2/ 1.7/ 1.6 GHz
o Cache Memory
§ 3/ 2/ 1 Mega Bytes
o Hard Disk Drive
§ 500/ 320/ 160 Giga Bytes
o Floppy Disk Drives
§ 1.44 MB
o CD Drive
§ 72/ 56/ 52 X
o Monitor
§ LCD, LED (1280 X 1024)
Computer Limitations
Ø Thinking limitations
o Computer virus
o Fast technological advancements resulting in obsolescence
o Risk of equipment failure
o Equipment downtime and recovery
Problems associated with Computerization
Ø Human Ego problems
Ø Standards enforcement problems
Ø Imbalance between Transparency and Security
Ø Mismatch between technological advancements and their implementation
Ø Misuse of computer resources
Ø Computer crimes
No comments:
Post a Comment