TTE = Travelling ticket examiner {Indian railways}

TC= Ticket collector {Indian railways}

There are various meanings of TC & TT. The definition changes as per the department and purpose. Below I have tried to give you the most appropriate answer, hope it resolve the query

1. Traffic controller (tc full form in police recruitment)
2. Transfer Certificate (required while getting admission in different school/college/university)
3. Ticket Collector (tc full form in railway)

Also Check, RRB NTPC , RRB Group D

• Ticket Collector, TC check passengers for valid tickets and fine ticket-less travelers. They are posted on platforms. They can be with or without uniforms (a Black Coat), but they must carry a badge and Id Card with them.
• On the other hand Train Ticket Examiner, TTE ensure that seats are rightly allotted to passengers with reservations, and fine ticket-less travelers in the train. They are posted on the running trains. They are always in uniform and have the reservation charts with them. They too have to carry a badge and Id Card with them on duty.