technme

what is a cpu? CPU stands for Central Processing Unit. There can be several processors in a computer, but one of them is the central one – the CPU.The reason the CPU is called a processor is because it can work with data. And it has two important jobs: 1. It can do calculations. 2. It can move data. The CPU is very fast at doing both jobs. The faster the CPU can do calculations and move data, the faster we say the PC is. There are three ways to improve a PC’s performance: 1. Higher clock frequencies 2. Greater bus width. 3. Optimising the core of the processor and other components so that the maximum amount of work is done for each clock tick.

PDA's ,portable computers came out in the mid to late 1980's. they had small keyboard attached with them a small display n basic features like alaram , calendar, calculator etc. They supported games and spreadsheets The Psion Organiser II, released in 1986, was very popular In 1993, Apple introduced the Newton MessagePad.It had electronic notepad, to-do list, calendar, telephone log and address file applications. The original PalmPilot was launched by Palm Computing in March of 1996. The PalmPilot ran for weeks on AAA batteries, was easy to use, and could store thousands of contacts, appointments and notes. A typical PDA: the Hewlett Packard iPAQ Pocket PC.

So what PDA really is? PDA is Personal Digital Assistant which provides the functionality of a cellular phone , web browser personal organiser n more. Input is usually using pen ie they are incorporated with handwriting recognition . It also has voice recognition functionality. PDAs are also called palmtops, hand-held computers and pocket computers.