North American Product Classification System (NAPCS) Canada 2017 Version 2.0
- 642 - Research and experimental development services
- 64231 - Research and experimental developmental services in natural sciences
- 642311 - Research and experimental developmental services in mathematical sciences
- 6423111 - Research and experimental developmental services in mathematical sciences
- 642312 - Research and experimental developmental services in computer and information sciences
- 6423121 - Research and experimental developmental services in computer and information sciences
- 642313 - Research and experimental developmental services in physical sciences
- 6423131 - Research and experimental developmental services in physical sciences
- 642314 - Research and experimental developmental services in chemical sciences
- 6423141 - Research and experimental developmental services in chemical sciences
- 642315 - Research and experimental developmental services in earth and related environmental sciences
- 6423151 - Research and experimental developmental services in earth and related environmental sciences
- 642316 - Research and experimental developmental services in biological sciences
- 6423161 - Research and experimental developmental services in biological sciences
- 642317 - Research and experimental developmental services in other natural sciences
- 6423171 - Research and experimental developmental services in other natural sciences
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