On screen display
Link quality
Connection loss between radio transmitter and the quad.
A transmission protocol linking the the radio transmitter to the quad.
Receiver to receive the stick commands and any other information sent from the radio.
Think of a UART as a flight controller’s (the main circuit board of the quad) USB ports you solder peripherals to them like GPS units RX’s all sorts of different things can use a UART.
Is a type of Crossfire RX (really small 
)
TBS is the brand (Team Black Sheep) Unify Pro32 Nano is the model and size of the video transmitter
TinyLED’s is the brand and a Sled is a mounting circuit board where you solder a board into a board:
TrueRC is the brand RHCP is Right hand Polarisation of the Antenna. This must match on both ends transmitting antenna and receiving antenna.
Is similar to Link Quality this is your signal strength between the RX on the quad and the TX on the radio.
hope this helps