Often, we run the computer day in and day out until it breaks. Truthfully, not many. Once broken in, computer systems provide remarkable reliability. When kept in a dry, dust and smoke-free environment, PCs become obsolete before they wear out. Heavy Net usage, however, places extra demands on hard disk drives.
Maintenance is needed.
Netscape and Internet Explorer browsers make full advantage of the hard disk. As a result, when hopping from site to site, all the stored information piles up. This results in a significant speed improvement because data travels much faster from the disk to the screen than from the Net to the screen. The techno-term for this is called disk caching , or caching for short. It is done automatically by the browser without your control or consent.