(electronics) tracks per inch / Initialism of third party intermediary. / Initialism of two-person integrity. / Initialism of tumor proliferation index.

Initialism of Thai Petrochemical Industry.

Initialism of totally and permanently incapacitated.

(tradecraft) Initialism of teeth per inch — a measure used on saw blades / (computing) Initialism of tracks per inch — a measure of disk capacity

present participle of TP