(computing) Any computing application that requires large amounts of numerical calculation.

A phone number as a mnemonic whose letters translate into numbers.

plural of 800 number

(mathematics) A mathematician who specializes in number theory

plural of number theorist

plural of cardinal number

A performance rating of diesel fuel corresponding to the percentage of cetane in a mixture with isocetane (or, formerly, methylnaphthalene) that would have the same performance.

plural of 900 number

(Canada, US) A telephone number for which an extra charge is assessed, part of which is returned to the owner of the number.

plural of E number