It refers to the Twitter PT Challenge. See the related link.
PT could mean playing time.
Perusahaan tambang it is Indonesian for mining company.
Personnel Transportation
what does pt mean on diamond ring
Tosho is a user on Twitter.
Personal Transportation No…It means Patrol Torpedo Boat.
pint
I believe 'pt' stands for patent, as in Colt patent firearms
pt (patent) fa (firearms) mfg (manufacturer)
RTMI officially on twitter means ReTweetMyIsh
Where Will You Be At.
Part - time ??