The chassis goes inside the part you see, which is variously called the lid, enclosure, or system unit cover. A number calculated from a block of data, used to verify the integrity of that data. For example, a modem could send a block of data and include the number of 1's that occur in the block. The receiving modem could count the number of 1's it receives and compare its own number with the transmitted number. The square or rectangular piece of plastic or metal that contains an integrated circuit.
Most chips have thin metal legs that connect to the integrated circuit inside.
See integrated circuit. An arrangement of electronic components wired together on a thin sheet of non-conductive material. The wiring is almost always printed on and within the card. Also the system board. A small circuit board, especially an expansion card.