Computer Science

LAN stands for Local Area Network, which refers to a network that connects computers within a limited area such as a home, school, or office building.

HTML (HyperText Markup Language) is the standard language used to create and structure webpages on the internet.

CRT stands for Cathode Ray Tube, which is a type of display technology used in older monitors. Therefore, CRT is a form of display monitor.

PROM stands for Programmable Read-Only Memory, which is a type of non-volatile memory that can be programmed once after manufacturing.

Ctrl + Y is a common keyboard shortcut used to redo an action that was previously undone, especially in Microsoft Office and many other applications.

When Excel's automatic calculation mode is disabled, pressing F9 recalculates all formulas in the workbook. This updates the values of formula cells manually.

RAM stands for Random Access Memory, which is a type of computer memory that can be accessed randomly. This allows data to be read or written in almost the same amount of time irrespective of the physical location of data inside the memory.

A WAN (Wide Area Network) covers a large geographic area, and mobile broadband connections are a typical example because they connect devices over long distances using cellular networks. The other options describe local networks, not WANs.

HTTP stands for Hypertext Transfer Protocol, which is the foundational protocol used for transmitting data on the World Wide Web (WWW). It enables communication between web browsers and servers.

In Microsoft PowerPoint, pressing Alt+K opens the Transitions tab on the ribbon, allowing users to access transition effects for slides.