Oracle was the predecessor to Teletext - started on ITV then moved to Channel 4.....
Not that I'm a nerd or anything..... That's just a coincidence....
Oracle was actually a specific teletext system used on ITV/C4 (the equivalent of Ceefax on the BBC) - rather than being a predecessor to teletext.
Not that I'm a nerd or anything myself...although I do find myself missing the days of "watching" Spurs on page 303 of Ceefax, and trying to picture how the game was unfolding.