Below is a list of places to find information .
http://bama.edebris.com/manuals/
http://manx.classiccmp.org/about.php
http://w140.com/tekwiki/wiki/Main_Page
http://www.davmar.org/concepts.html
http://www.coherent.com/Products/index.cfm?830/Laser-Measurement-and-Control
http://www.tinaja.com/ (Don Landcaster)
http://www.repairfaq.org/filipg/ (Fil’s world wide web )
http://www.alldatasheet.com/
http://www.dscc.dla.mil/programs/smcr/
http://bluewaveinc.com/ultrasonic-cleaning-101/
http://www.automationdirect.com/adc/Home/Home
http://www.watlow.com/products/controllers/
http://www.onbarcode.com/scanner/
http://www.freepcb.com/
http://www.retrevo.com/samples/index.html
https://www.zebra.com/us/en.html
http://www.stepperboard.com/motor_wiring_examples.htm
http://www.cnczone.com/index.php
https://www.superbrightleds.com/