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21Tube sound — (or valve sound) is the characteristic sound associated with a vacuum tube based audio amplifiers. Some audiophiles prefer the sound that is produced by the distortion characteristics of tube based amplifiers. The audible significance of tube… …
22Diesel locomotive — Three styles of diesel locomotive body: cab unit, hood unit and box cab. These locomotives are operated by Pacific National in Australia …
23AC power plugs and sockets — See also: Industrial and multiphase power plugs and sockets Plugs and sockets may sometimes combine male and female contacts, but t …
24Comparison of analog and digital recording — This article compares the two ways in which sound is recorded and stored. Actual sound waves consist of continuous variations in air pressure. Representations of these signals can be recorded using either digital or analog techniques. An analog… …
25Vaccine controversies — James Gillray, The Cow Pock or the Wonderful Effects of the New Inoculation! (1802) A vaccine controversy is a dispute over the morality, ethics, effectiveness, or safety of vaccinations. Medical and scientific evidence surrounding vaccinations… …
26Myelodysplastic syndrome — Classification and external resources ICD 10 D46 ICD 9 238.7 …
27Ultra Magnus (other incarnations) — As the Transformers franchise has grown, more continuities separate from the original series and its subsidiaries have come into existence, with some continuities featuring a unique version of the Autobot Ultra Magnus.Transformers: Robots in… …
28Analog sound vs. digital sound — Analog sound versus digital sound compares the two ways in which sound is recorded and stored. Actual sound waves consist of continuous variations in air pressure. Representations of these signals can be recorded in either digital or analog… …
29E-mail — Electronic mail, often abbreviated to e mail, email, or originally eMail, is a store and forward method of writing, sending, receiving and saving messages over electronic communication systems. The term e mail (as a noun or verb) applies to the… …
30Circuit breaker — For other uses, see Circuit breaker (disambiguation). An air circuit breaker for low voltage (less than 1000 volts) power distribution switchgear …
