In the context of the World Wide Web, a bookmark is a Uniform Resource Identifier (URI) that is stored for later retrieval in any of various storage formats. All modern browsers (web) include bookmark features. Bookmarks are called favorites or Internet shortcuts in Internet Explorer, and by virtue of that … Read more
What is ROM (Read-Only Memory) ?
Short for Read-Only Memory, ROM is a type of built-in memory that is capable of holding data and having that data read from the chip, but not written to. Unlike Random Access Memory (RAM), ROM is non-volatile which means it keeps its contents regardless if it has power or not. … Read more
What is RAM ?
RAM (Random-access memory) is a form of computer data storage. A random-access memory device allows data items to be read and written in roughly the same amount of time regardless of the order in which data items are accessed. In contrast, with other direct-access data storage media such as hard … Read more
What is a Hard disk drive ?
HDD(hard disk drive ) is a data storage device used for storing and retrieving digital information using rapidly rotating disks (platters) coated with magnetic material. An HDD retains its data even when powered off. Data is read in a random-access manner, meaning individual blocks of data can be stored or … Read more
What is a Keyboard ?
Keyboard is an important device that allows a person to enter symbols like letters and numbers into a computer. It is the main input device for most computers.
There are different types of keyboards. The most popular type is the QWERTY design, which is based on typewriter keyboards. The QWERTY … Read more
What is Mouse ?
Computer mouse is a hardware input device that was invented by Douglas Engelbart in 1963 while working at Xerox PARC, who at the time was working at the Stanford Research Institute, which was a think tank sponsored by Stanford University. The picture is of a Microsoft IntelliMouse and is an … Read more
What is SMPS ?
SMPS stands for Switched Mode Power Supply. It uses a switching regulator to convert electric power efficiently. SMPS transfers electric power from a source ( AC mains) to the load by converting the characteristics of current and voltage. SMPS always provide a well regulated power to the load irrespective of … Read more
What is UPS ?
UPS stands for Uninterruptible Power Supply. It is a power supply that includes a battery to maintain power in the event of a power outage. Typically, a UPS keeps a computer running for several minutes after a power outage, enabling you to save data that is in RAM and shut … Read more
What is a Serial port ?
A serial port (Computer) is a serial communication physical interface through which information transfers in or out one bit at a time (in contrast to a parallel port). Throughout most of the history of personal computers, data was transferred through serial ports to devices such as modems, terminals and various … Read more
What is a webcam ?
Webcam is a hardware camera connected to a computer that allows anyone connected to the Internet to view either still pictures or motion video of a user or other object. The picture of the Logitech Webcam C270 is a good example of what a webcam may look like. Today, most … Read more