There are two main categories of digital computers, namely general purpose and special purpose computers. Special purpose computers are designed and built for a specific application, whereas general purpose computers, the ones seen most commonly today, can be used for any application.
Within these two categories of digital computers, a classification based on capacity and performance allows a further distinction between four types of digital computers, namely the super, mainframe, mini and micro computers.
Handheld computers or PDAs, Personal Digital Assistants, are usually pen-based and battery-powered. They are small enough to be carried anywhere. Using a pen like stylus, they accept handwritten input directly onto touch screens. Although not as powerful as laptops or desktops, they are useful for storing addresses, scheduling appointments and games.
Within these two categories of digital computers, a classification based on capacity and performance allows a further distinction between four types of digital computers, namely the super, mainframe, mini and micro computers.
- Super Computers
- Mainframe Computers
- Mini Computers
- Micro Computers
Handheld computers or PDAs, Personal Digital Assistants, are usually pen-based and battery-powered. They are small enough to be carried anywhere. Using a pen like stylus, they accept handwritten input directly onto touch screens. Although not as powerful as laptops or desktops, they are useful for storing addresses, scheduling appointments and games.