Monandry refers to having at any one time only one?
One Day at a Time (album) One Day at a Time (album) One Day at a Time is a 1970 album by Joan Baez. Recorded in Nashville, the album was a continuation of Baez' experimentation with country music, begun with the previous year's "David's Album". It is significant in that it was the first to include Baez' own compositions, "Sweet Sir Galahad" and "A Song for David", the former song a ballad for her younger sister Mimi Fariña, and the latter song being for her then husband, David Harris, at the time in prison as a conscientious objector. "One Day at a Time" also included work
One-to-one (data model) One-to-one (data model) In systems analysis, a one-to-one relationship is a type of cardinality that refers to the relationship between two entities (see also entity–relationship model) A and B in which one element of A may only be linked to one element of B, and vice versa. In mathematical terms, there exists a bijective function from A to B. For instance, think of A as the set of all human beings, and B as the set of all their brains. Any person from A can and must have only one brain from B, and any human brain in B can