Web browser is software that serves display and interact with documents provided by the web server. Popular web browser is Microsoft Internet Explorer and Mozilla Firefox. Web browser user agent is the type most often used. Web itself is a collection containing documents and a network connected to each other, known as the World Wide Web.

A modem (modulator-demodulator) is a device that modulates an analog carrier signal to encode digital information, and also demodulates such a carrier signal to decode the transmitted information. The goal is to produce a signal that can be transmitted easily and decoded to reproduce the original digital data. Modems can be used over any means of transmitting analog signals, from driven diodes to radio.

The most familiar example is a voiceband modem that turns the digital 1s and 0s of a personal computer into sounds that can be transmitted over the telephone lines of plain old telephone services (POTS), and once received on the other side, converts those 1s and 0s back into a form used by a USB, Ethernet, serial, or network connection.

Modems are generally classified by the amount of data they can send in a given time, normally measured in bits per second (bit/s, or bps). They can also be classified by Baud, the number of times the modem changes its signal state per second. For example, the ITU V.21 standard used audio frequency-shift keying, aka tones, to carry 300 bit/s using 300 baud, whereas the original ITU V.22 standard allowed 1,200 bit/s with 600 baud using phase-shift keying.

Faster modems are used by Internet users every day, notably cable modems and ADSL modems. In telecommunications, wide-band radio modems transmit repeating frames of data at very high data rates over microwave radio links. Narrow-band radio modem is used for low data rate up to 19.2k mainly for private radio networks. Some microwave modems transmit more than a hundred million bits per second. Optical modems transmit data over optical fibers. Most intercontinental data links now use optical modems transmitting over undersea optical fibers. Optical modems routinely have data rates in excess of a billion (1x109) bits per second. One kilobit per second (kbit/s, kb/s, or kbps) as used in this article means 1,000 bits per second and not 1,024 bits per second. For example, a 56k modem can transfer data at up to 56,000 bit/s (7 kB/s) over the phone line.

Monitor or we often call a computer display screen. The term monitor usually depicted in a display box that can display anything from a computer device. As monitors of output media has an important meaning as the devices other computers. Everything is an important unit in a computer system when one of them dead, the system will not work.

Computer monitor is also described as an output device that displays characters and / or images, either still or moving, which is processed / ordered from the CPU through the input media.

A flash disk is a form of computer storage media. This type of storage accessory may also be known as a flash drive or a USB flash disk/drive. These are often used nowadays to store data and documents that you may once have had to store on a floppy disk in the past.

A flash disk will use a flash based memory element to store data. It will also usually incorporate a USB hub in its design which you can use to plug the disk directly into a computer. To save data, documents, files or photos to the disk you simply load them on to it via your computer. At this point you can detach the disk with the data you loaded on to it and either use it for storage or to take the data elsewhere.

Flash based disks have become so popular because they are small, portable and long-lasting. A flash disk will have no moving parts so it is less likely to break down or to get damaged if it is dropped, for example. Many disks in the sector are compact and easy to store or to carry around as necessary.

Flash disks can be a great way of storing data that you want to keep. They are also good for moving data from one computer to another. So, for example, if you want to work on some business documents in the evening at home you could use a flash disk to simply download the documents from your work computer and then upload them to your home computer later.

Flash disks come with differing memory capacities. The smallest disks here will usually allow you to store around 64MB of data. More complex models will allow you to store a lot more. In general terms your flash disk will cost more as its memory capacity increases. The smallest flash disks are competitively priced costing only a few pounds.

Most people will use flash disks for temporary storage or simply to store a certain amount of key data/a few key documents. It is unlikely, for example, that you could find a portable flash disk big enough to use as a PC back up. In most cases these devices will be used to move data from A to B and to allow you to take data or documents with you if you will need to use them away from your main computer.