Complex sentence: Some elements from occam 3 were introduced into the occam 2.1 compiler by other teams, and came to be known as'occam 2.5'-as in "half-way there".
Split into simpler sentences: Some elements from occam 3 were introduced into the occam 2.1 compiler by other teams. Initially, occam 2.1 was informally known as'occam 2.5'-as in "half-way there".