The OT timeline (OT: 'original trilogy' or 'original timeline') is a variant of the Companion timelines (more or less building off the dates from KQ1 timeline, KQ2 timeline & KQ3 timeline). The KQ8 timeline and AG timeline (which is heavily influenced by the Companion) more or less fit on top of this timeline as well. The Novel timeline fits on top of this timeline mostly (although it arguably differs on certain details of specific history see BB universe).