Also called an "interface card," "adapter" or "controller," all the printed circuit boards that plug into a computer's bus are technically expansion cards, because they "expand" the computer's ...

The WD_Black 1TB C50 Expansion Card is at its lowest price since Black Friday, thanks to a 30% discount on Amazon.

[Roland]’s ElkWiFi card slots into an available cartridge slot, after which the onboard ESP8266 (ESP-1 module) can be enabled and used as a WiFi modem. Acorn Electron with Plus 1 expansion ...