a slot
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A slot is a function that is called in response to a particular signal ... Lambda expressions are a convenient way to pass custom arguments to a slot ...
Wireless WAN (WWAN) slot cover and PCI Express Mini ...
Most ThinkPads have a WWAN slot. In older ThinkPads, the WWAN slot is a mini-PCI or mini-PCIe slot. In newer ThinkPads, the WWAN slot is a 2242 M.2 slot.
What is a Video Card?
A video card PCI slot is a slot on a computer's motherboard designed to house a video card, also known as a graphics card or GPU (Graphics Processing Unit).