RA Exhibitions
RB Patents
RC Metric Arts
RCZ Extractive and Productive Arts
RD Mining and Metallurgy
RG Agriculture, Rural Economic, Rustic Life
RGB Soils
RH Horticulture
RI Arboriculture, Forestry
RJ Animuliculture, Animal Products, Fisheries
RO Veterinary Medicine
RP Animal Products
RR Manufacture of Food and Drink
RQ Chemical Technology
RS Illuminants and Fuels
RSR Explosives
RSX Fireworks, Pyrotechnics
RT Chemical Arts and Electrical Arts
RU Telegraphy
RV Telephone
RW Lighting
RX Power, Motors
RY Domestic Economy – Household account books
RYS Servants
RYT Toilet
RZ Food and Cookery
S Engineering and Building (sanitary (SJ) and hydraulic engineering (SL), Transportation (ST),
Railroads (SV), Aerial Nawwigation (SZ))
SG Building
ST Arts of Transportation and Communication
SU Roads, Highways, Streets
T Manufactures and Handicrafts
T01-T24 particular departments
AR791 | R | Artificial
AU939 | R | Automation
EC19 | R | Economics
F491 | R | Finance
H121 | R | Hacking
P965 | R | Project
Q1 | R | Quality, Quality Assurance
R382 | R | Reliability Engineering
T255 | R | Technology, Technics, Craftsmanship, Artisan
W926 | R | Work, Workspace
H765 | Ry | Home
EC19-Economics and Finance:
E-CON-omics & Finance | Phora Nova
T255-Technology:
https://tunisbayclub.com/index.php?threads/macros-economics-predictions-for-2026.3117
Mechanicools | Phora NovaMechanicools | Phora Nova
Computing and Computer Programming:
For computing, see also: L – Science and Art together – Whitespace
Ry – Domestic Economy, Food, and Culinary Arts: