NG KENG TIONG is a Principal Engineer at Singapore Technologies (ST) Electronics Limited, a subsidiary of ST Engineering. Upon graduation from the Singapore Polytechnics, he signed up with the Republic of Singapore Air Force (RSAF) as an aircraft technician and worked in the E-2C Hawkeye repair bay, servicing the aircraft's avionics using automated test systems (CAT-IIID and RADCOM) and other in-house test equipment. . Upon invitation, he left the RSAF after his first contract and joined his present company, doing test program development and PCB diagnostics using Schlumberger S700 series testers. Since then, he has worked on other test platforms such as the Teradyne Spectrum(tm) 8800 series, the Westest-DATS/2000 test station, and some special-to-type-equipment (STTE) of similar nature. . He also has experience in logic simulation using HHB Systems CADAT(tm) software and the CATS- 10000(tm) hardware modeler, as well as Teradyne's LASAR(tm) simulator. . He has worked with engineers from companies such as Elbit and Thales, and recently completed two test benches for testing the transmitter and servo amplifier control of a naval sonar system. . In the course of his work, he encountered many printed circuit boards and electronic modules without schematic diagrams or documentation. That started him on the journey of doing PCB reverse engineering, in part or total, to perform the necessary troubleshooting for repair. Over time, he has refined the skill into an art for which this book is all about.