A keyboard shortcut for a command. For example, Ctrl + Alt + Delete is an accelerator key for the task manager in Windows 95.
The current window that is being used.
Async SRAM is not synchronized with the system clock, so the CPU must wait for requested data from the L2 cache.
BIOS stands for Basic Input and Output Software. The BIOS is software that controls the most fundamental operations of a computer and a BIOS is necessary in order to start a computer. Without a BIOS, a computer would not know how to communicate with its hard disk and other devices. The BIOS is stored on a ROM (Read-Only Memory) computer chip inside the computer. Many computers in the past few years use "Flash EPROM" chips, which means the BIOS chip can be reprogrammed with an updated BIOS. A BIOS may need to be updated to fix bugs, such as the year 2000 bug, or an update may be necessary in order to support new hardware protocols.
Bit is short for binary digit. A bit can be a zero or a one.