The loop ones. I've never seen them before.
They are test points, as shown here.
They are suitable for mini-grabber connections to lab equipment or probing
TP is the designator for Test Point.
The plastic part just moves the loop part off the board, but you can see some without the plastic part. Nothing more than a small looped section of conductive wire. They can function as jumpers at the same time.
They are used for test clips to grab onto.
Some other options are 2 dimensional holes: