When the board has no embedded components it is more correctly called a printed wiring board (PWB) or etched wiring board. However, the term printed wiring board has fallen into disuse. A PCB populated with electronic components is called a printed circuit assembly (PCA), printed circuit board assembly or PCB assembly (PCBA). The IPC preferred term for assembled boards is circuit card assembly (CCA), and for assembled backplanes it is backplane assemblies. The term PCB is used informally both for bare and assembled boards. 

Initially PCBs were designed manually by creating a photomask on a clear mylar sheet, usually at two or four times the true size. Starting from the schematic diagram the component pin pads were laid out on the mylar and then traces were routed to connect the pads. Rub-on dry transfers of common component footprints increased efficiency. Traces were made with self-adhesive tape. Pre-printed non-reproducing grids on the mylar assisted in layout. To fabricate the board, the finished photomask was photolithographically reproduced onto a photoresist coating on the blank copper-clad boards.

Answer this series of questions:

1. How were PCB's first designed?
2. What is it called if a board has no embedded parts?
3. What is the acronym for that?
4. Is there another name for it?
5. What is it called when there are electronic parts?
6. Are there other names for it?
7. What is the IPC preferred term?
8. What is the term preferred for backplanes?
9. How are PCBs manually created?
10. How much bigger than it's real size?
11. What is used to make traces?
12. What helps in the layout?
13. How is a board fabricated?
14. Is the term used formally for assembled boards?
15. How are component pin pads laid out?
16. What routes it to connect the pads?
17. What term isn't used much anymore?
18. What is the term used informally for?
19. Is the mylar used opaque?
20. What kinds of transfers are used?

Numbered answers:
1. manually
2. printed wiring board
3. PWB
4. etched wiring board
5. printed circuit assembly
6. printed circuit board assembly or PCB assembly (PCBA
7. circuit card assembly
8. backplane assemblies
9. creating a photomask on a clear mylar sheet
10. two or four times
11. component pin pads
12. Pre-printed non-reproducing grids on the mylar
13. finished photomask was photolithographically reproduced onto a photoresist coating on the blank copper-clad boards.
14. No
15. on the mylar
16. traces
17. printed wiring board
18. bare and assembled boards.
19. No
20. Rub-on dry transfers