Labels:book | clock | door | hakham | person | sky | stairs | vegetarianism OCR: HELP CONTENTS To use Help, click on one of the ped words below. FINDING YOUR WAY USING AROUND THE INDEX 7. OF MACHINES OPTIONS COPYING 2.8.7 AND PRINTING PRINCIPL LES OF SCIENCE LEAVING "THE WAY BOOK OF INV ENTORS THINGS WORK HISTORY OF MACHINES HAVING PROBI EMS? EXPLORING AN ARTICLE CREDITS GONTENTS PRINCIPLES