1T1

1T1 is an alphanumeric term whose meaning depends on context. In many cases it is read as “one-to-one” and used to describe a direct, single pairing or interaction between two entities. The exact sense varies by discipline but overall conveys personalization, pairwise correspondence, or exact mapping.

In education and training, 1T1 commonly denotes one-to-one tutoring or coaching—a teaching format in which a single instructor works with a single learner. In marketing and customer relations, 1T1 (often seen as 1:1) refers to one-to-one marketing and personalization, where communications and recommendations are tailored to an individual customer.

In mathematics and computing, 1T1 may appear informally to indicate a one-to-one mapping between sets or a one-by-one tensor or matrix; however, the standard terminology is one-to-one, bijection, or 1×1 matrix, and 1T1 is not a formal, universal designation in most references.

In product catalogs or technical catalogs, 1T1 can be a model number or code for a component or device; its meaning is not universal and depends on the issuing manufacturer. Overall, 1T1 is a flexible shorthand whose interpretation requires domain-specific context. Related terms include one-to-one, 1:1, and bijection.