• EngineeringForm[expr] prints with all real numbers in expr given in engineering notation.
• EngineeringForm[expr, n] prints with numbers given to n-digit precision.
• In "engineering notation" the exponent is always arranged to be a multiple of 3.
• You can mix EngineeringForm
• EngineeringForm acts as a "wrapper", which affects printing, but not evaluation.
• New in Version 1.