PSC 1.0.048 categories

PSC Subject Classification

Levels 1-2 follow the OECD Frascati Manual 2015 Fields of Research and Development (FORD) classification. Level 3 and subsequent POSI extensions are developed and governed independently by POSI, proposed and reviewed via GitHub pull request against this file — see ../../CONTRIBUTING.md.

1,021 of 1,023 journals (Core Collection + Global Benchmark) have been classified against this taxonomy via OpenAlex topic data — see PSC-CROSSWALK.md →. PSC is not yet wired into ranking cohorts (E-Q/M-Q/Citation Q peer groups) — the counts below are classification coverage, not ranked cohorts. Taxonomy pinned to posi-data@2f099e8 — the same taxonomy on every rebuild, not whatever happens to be on master that day.

Natural Sciences

7 categories

P1.01Mathematics

8 journals

P1.02Computer and Information Sciences

18 journals · 3 early-stage · 0 mature

P1.03Physical Sciences

44 journals · 0 early-stage · 5 mature

P1.04Chemical Sciences

50 journals · 0 early-stage · 7 mature

P1.05Earth and Related Environmental Sciences

47 journals · 0 early-stage · 7 mature

P1.06Biological Sciences

139 journals · 0 early-stage · 20 mature

P1.07Other Natural Sciences

Engineering and Technology

11 categories

P2.01Civil Engineering

9 journals

P2.02Electrical, Electronic and Information Engineering

30 journals · 0 early-stage · 6 mature

P2.03Mechanical Engineering

12 journals · 0 early-stage · 2 mature

P2.04Chemical Engineering

1 journal

P2.05Materials Engineering

46 journals · 0 early-stage · 1 mature

P2.06Medical Engineering

P2.07Environmental Engineering

P2.08Environmental Biotechnology

P2.09Industrial Biotechnology

P2.10Nanotechnology

P2.11Other Engineering and Technologies

31 journals · 0 early-stage · 3 mature

Medical and Health Sciences

5 categories

P3.01Basic Medicine

36 journals · 0 early-stage · 7 mature

P3.02Clinical Medicine

287 journals · 0 early-stage · 22 mature

P3.03Health Sciences

11 journals · 0 early-stage · 3 mature

P3.04Health Biotechnology

P3.05Other Medical Sciences

Agricultural and Veterinary Sciences

5 categories

P4.01Agriculture, Forestry and Fisheries

35 journals · 0 early-stage · 3 mature

P4.02Animal and Dairy Science

1 journal

P4.03Veterinary Science

P4.04Agricultural Biotechnology

P4.05Other Agricultural Sciences

Social Sciences

9 categories

P5.01Psychology

55 journals · 1 early-stage · 3 mature

P5.02Economics and Business

70 journals · 3 early-stage · 4 mature

P5.03Educational Sciences

16 journals · 0 early-stage · 1 mature

P5.04Sociology

28 journals · 3 early-stage · 0 mature

P5.05Law

1 journal

P5.06Political Science

10 journals · 0 early-stage · 3 mature

P5.07Social and Economic Geography

2 journals

P5.08Media and Communications

P5.09Other Social Sciences

17 journals · 0 early-stage · 1 mature

Humanities and the Arts

5 categories

P6.01History and Archaeology

P6.02Languages and Literature

6 journals · 0 early-stage · 1 mature

P6.03Philosophy, Ethics and Religion

10 journals

P6.04Arts

1 journal

P6.05Other Humanities

PSC Governance

Changes to this taxonomy happen only via pull request against posi-data, reviewed against journal scope statements, article topic distribution, and citation network data. Level 3 subcategories are added incrementally as journal coverage in a level-2 category grows large enough to warrant splitting it — not designed upfront by guesswork.

POSI Core Collection →Citation Reports →Open Data →