Early communications, which we still use in most instances, required a syntax-specific series of commands to be entered into a computer interface.
Most preparation programs require an aspiring principal to take a number of university courses to receive certification, a test, and in some instances require a candidate to attend an academy.
While we aimed to assess risk factors for prevalent TB disease, confirmation of diagnosis depended on radiological and bacteriological investigations, in some instances requiring a number of weeks for liquid culture results.
Los Angeles, for instance, requires a permit to buy ammunition.
For accounts with fewer than 50,000 miles, Delta Air Lines, for instance, requires a photocopy of a death certificate.
Certifying an echinacea supplement, for instance, requires a battery of chemical tests that measure the presence or absence of particular phenols, alkylamides, and acids.
Ms. Wiggin's plan, for instance, requires a marriage in which only one spouse has an over-enmeshed relationship with work.
A true understanding of climate change, for instance, requires a knowledge of meteorology, chemistry, economics and law, among many other things.
Figuring out how Obama is performing in individual states and how this translates to the Electoral College, for instance, requires a fair amount of attention to detail.
A simple hand grasp, for instance, requires a minimum of seven degrees of freedom; but full hand movement requires up to 27. 10.36am BST Less often discussed, says Dr Ashan, are the secondary symptoms of paralysis, namely its impact on bowel function, bladder, function, sexual function, respiratory capabilities, blood pressure.
