I'm tracing a circuit. What kind of capacitors are these yellow things? The upper one has markings of "105V 212K1", what does 212K1 stand for? The lower one has markings of "335V 136K4", what does 136K4 stand for?
335 = 3.3 uF. 105 = 1.0 uF.
Those are dry tantalum electrolytics. The end with the solid bar is the + (anode) connection. The mitered corners of the upper decal also indicate the + end of a capacitor.
The lower capacitor was not intended to be an electrolytic; it was changed to one after the board design was completed. That is why the solder pads are smaller, the decal is not mitered, and the part overhangs the courtyard (the sides of the decal).
The top shows the value, 105 = 1uF the bottom shows Mfg date code/factory code V =2924 SMD size Tantalum eg https://www.digikey.com/product-detail/en/avx-corporation/TAJA105K016RNJ/478-1649-1-ND/564681