PDHonline.com provides online (web-based) professional development courses (PDH, hours units credits or PDHs) continuing education units (CEU CEUs) and learning units (LU LUs) for engineer (engineers PE P.E.) land surveyor (surveyors LS PLS) and architect (architects AIA A.I.A. RA) provider sponsor free engineering forum software. MIT Electrical Engineering and Computer Science courses available online and for free. Great online courses, for free. Open courses from top universities. Welcome to Electrical…