AECArchitecture, Engineering and Construction
APTAutomatically Programmed Tool
Batch ModeComputer execution of submitted jobs in a sequential manner 
bitSmallest unit of data manipulated by a computer system
bpiBits per inch – typically in regards to magnetic tape
bpsBits Per Second
BpsBytes Per Second
ByteEight bits unit of data or memory
CADComputer-Aided Design or Drafting
CAEComputer-Aided Engineering
CAMComputer-Aided Manufacturing
CPUCentral Processing Unit – the main logic unit of a computer
CRTCathode Ray Tube such as used in TVs and computer monitors
DatabaseA method of storing computer data in an organized manner
DigitizerDevice for converting information on paper to a digital format
FEAFinite Element Analysis
FEMFinite Element Modeling – also known as Finite Element Mesh
GBBillions of Bytes
IGESInitial Graphic Exchange Specification
KBThousand of Bytes (actually 1024)
LayerMethod separate drawing data by type
Light PenCRT display input device that senses light as item is displayed 
MacroMethod of combining multiple individual commands into a single
MainframeTerm used to define large computer typically used in a batch mode
MBMillions of Bytes
MHzMillions of clock cycles per second
MIPSMillion of Instructions Per Second
MITMassachusetts Institute of Technology
NCNumerical Control
NodeA specific computer or other device in a network
NURBSNon-Uniform Rational B-Splines
PADLPart & Assembly Description Language (University of Rochester)
PCPersonal Computer
P&IDProcess and Instrumentation Diagram
Post ProcessorSoftware that converts an NC program’s output to work with a
             specific machine tool
TurnkeyAll components of a system, hardware and software, are sold by a 
             single vendor
UNIXOperating system originally developed at Bell Laboratories