Jackson & Lowe - prior to the rollout of SIS TV coverage in betting shops in 1987, J&L printed lists of runners for each race of the day and supplied them to off-course bookmakers.
The original J&L sheets were narrow and generally pinned to a blackboard. A boardman armed with a box of coloured chalks would write the shows against each horse as they were given out by Extel broadcasts through loudspeakers in the shop. The price of the favourite in the race was normally indicated in red. Following the race the boardman would record the result, SP, tote returns etc on a separate part of the blackboard.
(Using the full range of chalks and varying fonts one boardman I knew produced true works of art comparable to the output of Velasquez, Monet and Banksy. Well, perhaps not Velasquez. Or Monet. Anyway, it's a shame some of these boards could not be preserved for posterity in some kind of Betting Shop Museum but I guess this was not possible due to the impermanent nature of chalk.)