Drafting-Freehand+drawing

"The History of the CAD ." //CADbuilt//. CAD Drafting, 21 Apr. 2007. Web. 18 Nov. 2010. []. > > > >
 * "Two of these other systems, CADD (Computer-Aided Design and Drafting) and CAID (Computer-Aided Industrial Design) are the most commonly used."
 * "Today’s designers use sleek, super-fast computers and CAD software systems that can quickly and perfectly create, edit, then display finished projects in breathtaking 3-D computer renderings."
 * "Software companies and thousands of dedicated developers and programmers saw that potential and have worked tirelessly for over 30 years now to develop and bring CAD drafting programs to where they are today."
 * "The initial developments that led to today’s CAD programs were first carried out in the early 1960’s and 1970’s in the aerospace and automotive industries."
 * "The main feature of SKETCHPAD was that it allowed the designer to work with the program by drawing on the monitor with a light pen."
 * "The first programs were only available to large corporations in the automotive, aerospace and electronics industries."
 * "The leaders in developing these first programs were GM, Lockheed and Renault."
 * "The first CAD programs in the 1970’s were only capable of creating 2D drawings similar to the hand-drafted drawings of the time."
 * "In 1981 two solid modeling packages were released- Romulus by (ShapeData) and Uni-Solid by (Unigraphics)."
 * "In the late 1980’s and early 1990’s the solid modeling kernels for rendering 3D designs were integrated into the new CAD programs for the first time."
 * "SolidWorks was released in 1995, SolidEdge was released in 1996, and IronCAD was released in 1998."
 * "A machine with dual-processors and massive amounts of RAM is needed for maximum performance on complex projects."
 * "Today there are many low-end 2D systems available and even a number of free and open source programs."
 * "3D parametric solid modeling represents the high end of CAD."
 * "In the late 1980’s the advent of affordable CAD programs that ran on desktop computers led to downsizing in the drafting departments of many small- to mid-sized companies."