Hardware is any part of the computer system you can see or touch. An Expansion Card is a a circuit board that lets you to add features to your computer. An Expansion Card Slot is a socket on the motherboard that allows you to add an expansion card to your computer. The External Cache is on the motherboard, the computer looks here when it cannot find the data it needs in the internal cache. The Internal Cache is on the CPU chip and provides the fastest way for the computer to get data, the computer looks in the Internal Cache first when it needs data.
Memory works like a blackboard that is constantly overwritten with new data.
The data stored in memory disappears when you turn off the computer. The amount of memory determines the number of programs a computer can run at once and how fast programs will operate. Memory is measured in bytes, computers should have at least 8 MB, but 16 MB is recommended for todays software. The size of a monitor is measured diagnonally across the screen. The Resolution of a monitor determines the amount of information a monitor can display.