Workstation - An electronic computing device (e.g., a laptop or a desktop computer), or any other device that performs similar functions, and electronic media stored in its immediate environment. DL1.55.
NIST SP 800-82 Final Draft
Workstation - A computer used for tasks such as programming, engineering, and design. [Falco, Joe, et al., IT Security for Industrial Control Systems, NIST IR 6859, 2003, http://www.isd.mel.nist.gov/documents/falco/ITSecurityProcess.pdf.]