References 
 Albus, James S; et al; 
NIST Support to the Next Generation Controller Program: 1991 Final Technical Report; NISTIR 4888; National Institute of Standards and Technology, Gaithersburg, MD; July 1992
 
 Allen-Bradley; 
RS274/NGC for the Low End Controller; First Draft;
Allen-Bradley; August 1992
 
 Electronic Industries Association; 
EIA Standard EIA-274-D Interchangeable Variable Block Data Format for Positioning, Contouring, and Contouring/Positioning Numerically Controlled Machines; Electronic Industries Association; Washington, DC; February 1979
 
 Fanuc Ltd.; 
Fanuc System 9-Model A Operators Manual; Pub B-52364E/03; Fanuc Ltd; 1981
 
 Kramer, Thomas R.; Proctor, Frederick M.; Michaloski, John L.; 
The NIST RS274/NGC Interpreter, Version 1; NISTIR 5416; National Institute of Standards and Technology, Gaithersburg, MD; April 1994
 
 Kramer, Thomas R.; Proctor, Frederick M.; 
The NIST RS274KT Interpreter; NISTIR 5738; National Institute of Standards and Technology, Gaithersburg, MD; October 1995
 
 Kramer, Thomas R.; Proctor, Frederick M.; 
The NIST RS274/NGC Interpreter - Version 2; NISTIR 5739; National Institute of Standards and Technology, Gaithersburg, MD; October 1995
 
 Kramer, Thomas R.; Proctor, Frederick M.; 
The NIST RS274/VGER Interpreter; NISTIR 5754; National Institute of Standards and Technology, Gaithersburg, MD; November 1995
 
 Kearney and Trecker Co.; 
Part Programming and Operating Manual, KT/CNC Control, Type C; Pub 687D; Kearney and Trecker Corp.; 1980
 
 Martin Marietta; 
Controls Standardized Application (CSA); Draft Volume V of Next Generation Workstation/Machine Controller (NGC) Specification for an Open System Architecture Standard (SOSAS); Martin Marietta Document No. NGC-0001-14-000-CSA; March 1992
 
 Monarch Cortland; 
Programming Manual for Monarch VMC-75 with General Electric 2000MC Controls; Monarch Cortland Publication Number PRG GE2000MC-4
 
 National Center for Manufacturing Sciences; 
The Next Generation Controller Part Programming Functional Specification (RS-274/NGC); Draft; NCMS; August 1994
 
 Proctor, Frederick M.; Kramer, Thomas R.; Michaloski, John L.; 
Canonical Machining Commands; NISTIR 5970; National Institute of Standards and Technology, Gaithersburg, MD; January 1997