CSI’s various classification and formatting standards serve different purposes, and CDT content draws clear distinctions between them:

The United States National CAD Standard (NCS) and the AIA CAD Layer Guidelines (now part of NCS) define graphic conventions, sheet organization, layering, and symbols for CAD drawings.

The CSI Uniform Drawing System (UDS) (now integrated into the NCS) provides consistent formats and conventions for construction drawings, including sheet organization, drawing set organization, schedules, notation, and symbols.

All three—NCS, AIA CAD Layer Guidelines, and CSI UDS—are associated with graphical and organizational standards for construction drawings.

By contrast:

MasterFormat® is CSI’s specification and work-results classification system, which organizes information primarily into Divisions and Sections for specifications and other written documents, not drawings. CDT materials repeatedly emphasize that MasterFormat is used to organize project manual content and other written construction information, not the graphical content of the drawings.

Therefore, the one item not used as a graphical format for organizing drawings is:

D. MasterFormat®

Why the other options are correct as “graphical” or drawing-related formats:

A. United States National CAD Standard – Provides a nationally coordinated standard for CAD drawing presentation, including layering, symbols, and sheet organization.

B. AIA CAD Layer Guidelines – Define standard layer naming and structure for CAD drawings; these are explicitly about how graphical information is organized in electronic drawings.

C. CSI Uniform Drawing System – Developed to standardize the organization and graphical conventions of drawings, later integrated into NCS.

Thus, from a CSI standpoint, MasterFormat® is the outlier here: it organizes written construction information, not graphical drawing formats, making Option D the correct choice.