With the following exceptions, TCC-RT treats upper case and lower case letters identically:
The relational operator EQC (in IF, IFF, DO, etc.)
The character manipulation functions @ascii, @unicode, @repeat, @replace, @similar, @strip and @wild.
The codes used to specify units of storage size (kKmMgGtT) in:
•size ranges
•disk space and file size reporting functions