| Subject | English | French |
| avia., Canada | C of R | certificat d’immatriculation |
| tech. | c.i.r. | infrarouge couleur |
| tech. | c.i.r. | irc |
| commun. | C/R | C/R |
| commun. | C/R | bit du champ de commande/réponse |
| environ. | c.r. cathode-ray tubes | tubes à rayons cathodiques |
| agric. | C.R.S | tabac à base de côtes laminées et hachées |
| commun., el. | R-C coupling | couplage par résistance-capacité |
| commun., el. | R-C coupling | couplage R-C |
| el., construct. | r.c.foundation | massif en béton armé |
| el., construct. | r.c.foundation | fondation en béton armé |
| el. | R.C.lamp | lampe à construction renforcée |
| el. | R.C.lamp | lampe C.R. |
| comp., MS | R1C1 notation | notation R1C1 (" A convention for referencing the location of cells in a worksheet in which both the rows and the columns on the worksheet are numbered. The location of a cell is indicated with an "R" followed by a row number and a "C" followed by a column number.") |
| fin. | R.C.R. | démarcheur agréé qui travaille pour le compte d'une Commission House |