What is Computer ? and its Types ?

 

TYPE OF DIGITAL COMPUTER

1. Micro computer
2. Mini computer
3. Mainframe
4. Super computer

1. MICRO COMPUTER 

• can be classified into:
• Desktop PCs 
• Sites on desk ,rarely move ,large and bulky .
• Memory capacity , graphic capacity and software availability vary from one computer to another used both for business and home applications.

Portable  PCs 

• can be moved easily from one place to place .
• Weight may varies .
• Small PCs are popular known as laptop.
• Widely used by students , scientist , reporters etc.

ADVANTAGES

• Small  in size
• Low cost 
• Portability
• Low computing power 
• Commonly used for personal applications.

DISADVANTAGES 

• Low processing speed

 2. MINI COMPUTER

• Medium sized computer .
• Also called The minis .
• e.g. IBM36 , HP9000 etc .
• Computing power lies b/w micro computer and mainframe computer .

CHARACTERISTICS

• Bigger size than PCs 
• Expensive than PCs
• Multi-user 
• Difficult to use 
• More computing power than PCs .
• Used by medium sized business organization  , collages , liabraries ,and banks .

ADVANTAGES 

• Cater to multiple users .
•  Lower cost from mainframe .

DISADVANTAGES 

• Large 
• Bulky 

 3. MAINFRAME 

• Known as enterprise services .
• Occupies entier rooms or floor .
• Used for centrailized computing .
• Serve distributed users and small servers in a computing network .
• Large fast and expensive computer .
•  Cost million of dollars :- e.g. IBM3091 , ICL39 etc .

CHARACTERISTICS 

• Bigger in size than main computer .
• Very expensive .
• Support a few hundred users  simultaneously ( multi-users ) .
• Difficult to use .
• More computing power than mini computer .
• Have to be kept in a special air conditioned room .
• Used in big business organizations and government departments .

 4. SUPER COMPUTER 

• Fastest and expensive .
• Used by applications for molecular chemistry , nuclear research , whether  reports , and advanced physics .
• Consists of several computers that work in parallel as a single system .

ADVANTAGES

• Speed 

DISADVANTAGES 

• Generate a large amount of heat during operation .

 Follow my whatsapp channel for daily updates Blog.Com🌷