PCB Printed circuit board not populated
PCBA Printed circuit board populated with components
PCS Single piece printed circuit board
Panel Composition of one or more pieces (PCS) PCB of the same design
Tooling A set of data / films / masks to manufacture the PCB
Stencil To apply the solder paste on the PCB
NRE Non-recurring engineering cost (all one-time cost made to execute the project, stencil and tooling can be part of it)
CoC Certificate of Conformity
BGA Ball Grid Array
SOT Small-Outline Transistor