Ours is a very young profession: when the first edition of the Instrument Engineers’ Handbook (IEH) came out, Marks’ Mechanical Engineers’ Handbook was in its fifth edition, and Perry’s Chemical Engineers’ Handbook was in its sixth! Now, as we are starting to work on the fourth edition of the IEH, we are already in a new millenium. But while our profession is young, we are also unique and special. After all, no other engineering profession can claim what we can! No other engineering profession can offer to increase the GDP by $50 billion without building a single new plant, and to do that while increasing safety and reducing pollution. We can.