Adapter cards, also known as expansion cards, are internal components for computers that increase functionality by adding new capabilities. They are essentially circuit boards that slot into designated ports on a motherboard, giving your computer extra features. Here's a breakdown of adapter cards: Types of Adapter Cards: There are many different types of adapter cards available, each serving a specific purpose. Some common examples include: Graphics Cards (Video Cards): These are essential for gamers and design professionals as they handle displaying visuals on your monitor. Network Interface Cards (NICs): These cards allow your computer to connect to a wired network via ethernet cable. Some NICs also offer wireless connectivity. Sound Cards: These provide audio capabilities for your computer, allowing you to hear sound through speakers or headphones. Wi-Fi Cards: These add wireless networking functionality to your computer, enabling you to connect to the internet without an ethernet cable. USB Expansion Cards: These cards add additional USB ports to your computer, allowing you to connect more peripherals. Capture Cards: These cards enable you to capture video signals from external devices like cameras or game consoles, allowing you to record or stream the footage. TV Tuner Cards: These cards allow your computer to function as a TV receiver, letting you watch and record live TV broadcasts.