The hand signal to stop, is to put your open left hand out and bent down at the elbow. These 3 are the basic signals taught in drivers Ed. Open handed left arm straight out = left turn, open handed left arm out, bent at elbow pointing up = right turn.
What is SPE. Society of Petroleum Engineers (SPE) is the largest individual-member organization serving managers, engineers, scientists and other professionals worldwide in the upstream segment of the oil and gas industry. SPE offers a unique opportunity to contribute to the profession through its programs and activities.
SAE is an abbreviation for Society of Automotive (formerly Automobile) Engineers. SAE when referring to tools means that the tools follow the standard measurements set by the SAE. 1/2 9/16etc. Not that the tool is approved or endorsed by the SAE. So yes, it only pertains to American measurement tools.