1, The full form of TTL is Transistor–transistor logic. It’s used on Academic & Science ,Electronics in Worldwide

Transistor–transistor logic (TTL) is a class of digital circuits built from bipolar junction transistors (BJT) and resistors. It is called transistor–transistor logic because both the logic gating function (e.g., AND) and the amplifying function are performed by transistors

2, The full form of TTL is Time to live. It’s used on Computing ,Networking in Worldwide

Time to live (TTL) is mechanism that limits the lifespan of data in a computer or network. TTL may be implemented as a counter or timestamp attached to or embedded in the data. Once the prescribed event count or timespan has elapsed, data is discarded.