FN_HASTTS()      Is TTS available?  Yes or No?
 FN_TTABORT()     Abort transaction
 FN_TTAVAIL()     Determine TTS availability
 FN_TTBEGIN()     Begin transaction
 FN_TTEND()       End transaction
 FN_TTGAPT()      Get TTS Application Thresholds
 FN_TTGWST()      Get TTS workstation thresholds
 FN_TTSAPT()      Set TTS Application Thresholds
 FN_TTSTAT()      Get TTS Transaction Status
 FN_TTSWST()      Set TTS Workstation Thresholds
 OVERVIEW         TTS Overview