Computer: A Programmable Machine

A computer is a programmable machine. The two principal characteristics of a computer are: it responds to a specific set of instructions in a well-defined manner and it can execute a prerecorded list of instructions (a program).

Computers can be generally classified by size and power as follows
Personal Computer: a single-user computer based on a microprocessor. In addition to the microprocessor, a personal computer has a keyboard for entering data, a monitor for displaying information, and a storage device for saving data.
Workstation: a powerful, single-user computer. A workstation is like a personal computer, but it has a more powerful microprocessor and a higher-quality monitor.
Mainframe: a powerful multi-user computer capable of supporting many hundreds or thousands of users simultaneously.
Supercomputer: an extremely fast computer that can perform hundreds of millions of instructions per second.

In 1801, Joseph Marie Jacquard made an improvement to the textile loom.
In 1944, Harvard Mark I, 5-ton computer
In mid-1948, Manchester Baby, it was possible to load programs into computer memory, which were then read
In 1968, Dynabook, this concept computer featured a display and keyboard attached on a single slate. It was small enough to carry with one hand but contained the two major user interface elements of the day – a display and keyboard.
In 1983, Compaq Portable, was a commercial success. It weighed 28 pounds
In 1989, Compad LTE, was notably the first notebook computer, it weighed 6.7 pounds
Nowadays, Intel ATX, is a form factor specification by Intel. It is not a computer, obviously, but it’s as important to the computer’s evolution.

The population in viet nam is about 91 milion, internet users are about 31 milion
that has promoted development of e-commerce. In 2012, the income of e-commerce achieved about 1 billion dolars
the Gps tracking was one of developed technology in vietnam
it was very popular in the area of vehicle
86% of...