The practice of marking all word boundaries in long identifiers (such
as ThisIsASampleVariable) (including the first letter of
the identifier) with uppercase. Constrasts with camelCasing, in which the first character of
the identifier is left in lowercase
(thisIsASampleVariable), and with the traditional C style
of short all-lower-case names with internal word breaks marked by an
underscore (sample_var).
Where these terms are used, they usually go with advice to use
PascalCasing for public interfaces and camelCasing for private ones. They
may have originated at Microsoft, but are in more general use in ECMA
standards, among Java programmers, and elsewhere.