The ETA has several courses you can get in books, or on disc, or online with tutors. I think the online courses are good for 5 months, the disc you keep and study as long as you wish, like the books. The iscet cet exam is pretty indepth and you would probably be better off with the ETA exams because they come in parts, dc first, then ac, then semicondutors, then digital i think. with the ETA the certification is for life while the CETa is only for 4 years. Also the fcc general radiotelephone operators licence is for life and its more directed toward communications electronics while the CET and ETA exams are on basic electronics with other specialized test you can take later to cover different areas of electronics.If you are starting at the beginning the ETA courses on DC first, then Ac, then Semicondutors, and then Digital would be the way to go.