Magnetic tape is an auxiliary (secondary) memory used for data storage and backup. It is non-volatile and provides large storage capacity at a low cost. ROM, SRAM, and cache memory are primary or main memory types.

Optical fibre is used to carry light pulses for transmitting information. It is widely used in telecommunications and internet networks due to its high-speed data transfer and resistance to electromagnetic interference.

The header section of an email contains metadata such as information about the sender, receiver, subject, and routing details. The actual text message or body of the email is separate from the header.

A WAN (Wide Area Network) is used to connect computers and other devices over large geographic areas, such as countries or continents. Examples include the internet. LAN (Local Area Network) is limited to smaller areas, like offices, while Bluetooth and Wi-Fi are for short-range communication.

Superscript is not a font style; it is a text format that raises the text slightly above the baseline, commonly used in mathematical or scientific notations. Font styles include Bold, Italic, and Regular, which define the appearance of the text.