file name definitions

pls i know somebody out there knows its definition, like ????PLT.P3 what is it for? and so on

Your P3 installation disk at \Manuals\P330batch.pdf has a complete listing of files and field definitions. Here is a copy of the part directly relating to your question,

ACT Activities Table
REL Relationships Table
LOG Log records Table
WBS Assignments Table
SRT Current sort Table
AIT Read Only Activity custom data items Table
RES Resource assignments Table
STR WBS Structure Table
ACC Cost Accounts Table
RLB Resource dictionary Table
RIT Read Only Resource custom data items Table
DTL Read Only Activity code titles/values Table
HOL Holiday file Table
TTL Title descriptions
DIR General project information Table
SPR Resource cost/spread table
ITM Data in dictionary records
CAL Calendar definition file
REP Resource earned value
AC2 Restricted access records
LAY Project layouts
STW Communicates with SureTrak program

I hope that this is what you were looking for. Good luck!