As somoene who supports many thousands of people using computers - I can tell you the terms "blicky" and "clickie" have helped ENORMOUSLY with people understanding. Especially good though is the phrase "blue clicky thing" - something almost everyone can understand immediatley - whereas they don't know a "hypertext link" or "clickable link" from a topographical map.

URL is another one that confuses them - "address" they understand - URL no.