$cdf – To be completed
$char - Converts the value of the specified integer to its equivalent Unicode character
$chars - Converts an array of integer numbers into a string containing their equivalent Unicode characters
$comread – To be completed
$cwd – To be completed
@cos - Returns the cosine of the specified floating point angle value
@cosh - Returns the hyperbolic cosine of the specified floating point angle value
cd – To be completed
cdfs – To be completed
cdfsort – To be completed
cdfw – To be completed
char - Converts the first Unicode character of a string to its integer value
chars - Converts an a string of Unicode characters into an array of integer values
clear – To be completed
comclose – To be completed
comfrig – To be completed
comopen – To be completed
comwrite – To be completed
copy – To be completed
count – To be completed
countline – To be completed
created – To be completed