I noticed Robin Michael, who is on this site, stated she learned to spell the word 'vacuum' as "vacumn". I was also taught the same thing in school around 40 years ago; I always scored the
+1 It seems that vacuum is the odd word out when placed in a lineup with (for example) continuum, individuum, menstruum, and residuum. I don't know why the -uum in vacuum came to be pronounced differently from the -uum in the others, but to judge from the pronunciation offered in John Walker's A Critical Pronouncing Dictionary, and Expositor of the English Language (1807), 'twas not always thus.
(In a vacuum, “Am I not?” could only be construed as some sort of philosophical counter-Descartian pondering.) In light of this dependence, the comma is more apt then the semicolon.
If a 'vacuum cleaner cleaner' is a machine for cleaning vacuum cleaners, then the person who cleans the vacuum cleaner cleaner would be a 'vacuum cleaner cleaner cleaner'.
In other words, don't talk about how the vacuum cleaner was made in Germany and incorporates the latest technology; tell the client he'll be able to vacuum the house in half the time and he'll never have to buy a replacement bag.
Electronic strictly denotes electricity in semi-conductor material (initially in the vacuum of a vacuum tube). Saying a device is electronic means it works by using semi-conductor components (or vacuum tubes), namely diodes, transistors, etc.
After more research, I've found the term definitely predates vacuum tubes, so this suspicious etymology is historically INCORRECT. The Oxford English dictionary's earliest citation is from 1889 where the term is used to refer to a problem in a phonograph.