| Keyword | Definition |
|---|---|
| CD | stores binary data on spinning discs covered in pits and lands which either absorb or reflect laser light |
| DVDs | stores binary data on spinning discs covered in pits and lands packed closely together which either absorb or reflect laser light |
| Ethernet | transmits binary data by sending and receiving electrical pulses down pairs of wires between two computers |
| Fibre Optic | transmits binary data by sending and receiving pulses of light inside a cable that reflects the signal so it can be detected at the other end |
| Hard Disk | stores binary data on spinning discs covered in tiny sectors which can be magnetised in one of two directions |
| Solid State Drive | stores binary data without any moving parts using electronic chips containing NAND gates and flash memory |
| WiFi | transmits binary data by sending and receiving radio pulses switched on and off at a very high frequency |
