Internet
Internet is a network of few million server-computers located worldwide connected to each other through cables (both underground and across oceans) and satellites. It is connected to the computers at the centres of information like the urversities libraries, newspapers etc. and nas access to information on almost all topics. Most often it is more than what any library anywhere can have. It also helps people to send messages and chat with their friends. People who do not have a computer at home, can avail this facility through commercial outlets, often called cyber cafes, who charge a small fee on hourly basis.
Its weaknesses
As any other machine, a computer too has some shortcomings. It is better to know them before we start relying on it completely.
Although the electronic components used in a computer are susceptible to failure, the probability of this occurring is rather low. Years of research and development have ensured this. A much more frequent failure is the Hard Disk crash. The Hard Disk of a computer can get damaged and once this happens, all the useful information stored in it is often lost. Similar accidents are possible with the other disks and disk drives.
A floppy is often not very durable. After several cycles of write and rewrite operations, they often get damaged. A CD, although thought to be much more durable, demands extra care. If its silvery surface gets smudged with fingerprints, it can also get damaged.
A PC with a GUI Operating System needs to be shut down properly. If a computer is shut down abruptly, very often its HDD can get damaged.
A computer is susceptible to the viral attack. A virus can seriously damage many files It can also cause irreparable damage to the Hard Disk.
Virus and Computer
Remember, the last time when you or someone close was down with a viral attack. One becomes very slow, erratic and lethargic. A computer infected with a virus shows similar symptoms. Viruses that attack our body are either air-borne or water-borne. A computer virus, on the other hand, is a computer program that can spread only through infected disks (mostly floppies) or files transmitted through the Internet.
While our body can recover from a viral attack on its own (given proper diet and care), a computer cannot. It needs a special kind of application software, called the anti-virus software, to find the nature of the virus and cure it.