Multiplexing techniques vary widely based on what is being multiplexed. Modern telecommunications use a very wide array of techniques including:

TDM - examples: TDMA, T-carrier

FDM - examples: DWDM

Spatial - example: MIMO

Code division - examples: CDMA

Phase or polarization division - cable/satellite TV

Statistcal - examples: packet mode (STS), FHSS etc etc.

This is far from a complete list. I think the question needs to be more specific.

Time Division Multiplexing and Frequency Division Multiplexing.

Allows multiple data channels across a single medium by separating the data streams onto different frequencies (FDM), or by sending one stream, waiting, then sending the other stream (TDM).

Frequency-division multiplexing, wavelength-division multiplexing, and time-division multiplexing.

FDM stnds for frequency division multiplexing and it is used only in case of analog signals because analog signals are continuous in nature and the signal have frequency.

TDM-stands for time division multiplexing and it is used only in case of digital signals because digital signals are discrete in nature and are in the form of 0 and 1s. and are time dependent.

TDM MEANs TIME DIVISION MULTIPLEXiNG, of any transmitting signal ,

integrating it means combining all the different signals over into a common signal

for the bulky transmission of the signals at same channel in same time