The specification for "iconv" is as specified in the Single UNIX Specification, Version 2 but with the following differences as listed below.
The behaviors specified in this section are expected to disappear from a future version of the LSB; applications should only use the non-LSB-deprecated behaviors.
lists known coded character sets (synonym for the -l option which is found in the Single UNIX Specification, Version 3 but not yet specified here).
write output to specified output file (instead of stdin).
prints progress information.