| Code | Manufacturer Name |
| ACE | Alternative Chassis Engineering |
| AD | Alexander Dennis |
| ADC | ADC |
| AEC | AEC |
| AEC-Be | AEC-Beadle |
| AEC/MCCW | AEC/MCCW |
| AEH | Albion Equipment Company |
| AJS | AJS |
| AM | Austin-Morris |
| AOS | Anadolu Isuzu |
| Aa | Ailsa |
| Alfabus | Jiangsu Alfa Bus Co |
| Alstom | Alstom |
| An | Albion |
| Anhui Ankai | Anhui Ankai |
| Argo | Argo |
| Arrol-Johnston | Arrol-Johnston |
| Arv | Arrival |
| As | Ayats |
| Ashok-Ld | Ashok-Ld |
| Asia | Asia Motors |
| Asn | Autosan |
| Atk | Atkinson |
| Au | Neoplan |
| Audi | Audi |
| Aurrigo | Aurrigo |
| Aus | Austin |
| BBd | Blue Bird |
| BCI | BCI |
| BMAM | BMC (Austin-Morris) |
| BMB | BredaMenarinibus |
| BMC | BMC |
| BMMO | B.M.M.O. (Midland Red) |
| BUT | B.U.T. |
| BYD | BYD Auto |
| Ba | Bova |
| Bd | Bedford |
| Bd/Co | Bedford/Caetano |
| Be | Beadle |
| Be-AEC | Beadle-AEC |
| Be-Bd | Beadle-Bedford |
| Be-Cr | Beadle-Commer |
| Be-Ld | Beadle-Leyland |
| Be-Sl | Beadle-Sentinel |
| Bean | Bean |
| Beardmore | Beardmore |
| Belsize | Belsize |
| Berliet | Berliet |
| Bl | Bristol |
| Bollore | Bollore |
| Bom | Bombardier |
| Borgward | Borgward |
| Bramwith | Bramwith |
| Brossel | Brossel |
| Bru | Brush |
| Btn | Barton |
| Burford | Burford |
| Bustech | Bustech |
| CRRC | CRRC |
| CVE | City Vehicle Engineering |
| Ca | Castrosua |
| Cad | Cadillac |
| Caledon | Caledon |
| Cannon | Cannon |
| Cb | Carbodies |
| Ch | Chevrolet |
| Chr | Chrysler |
| Clarkson | Clarkson |
| Cleveland Car Co | Cleveland Car Co |
| Clyde | Clyde |
| CmDg | Custom Denning |
| Cn | Crompton |
| Co | Caetano |
| Cobus | Cobus |
| Coman | Coman |
| Contrac | Contrac |
| Cr | Commer |
| Ctn | Citroen |
| Cy | Crossley |
| DAB | DAB |
| DAF | DAF |
| DBs | Durabus |
| Dacia | Dacia |
| Daihatsu | Daihatsu |
| Dat | Datsun |
| De | Dodge |
| De Dion-Bouton | De Dion-Bouton |
| Delahaye | Delahaye |
| Deltrain | Deltrain |
| Designline | Designline |
| Dm | Drogmoller |
| Dotto | Dotto |
| Dr | Daimler |
| Ds | Dennis |
| Du | Duple |
| Durkopp | Durkopp |
| ECW-Ds | ECW-Ds |
| EEC | EEC |
| EOS | Van Hool EOS |
| ERF | ERF |
| Easymile | Easymile |
| Ebo | Ebro |
| Ebusco | Ebusco |
| Eqm | Equipmake |
| Etpr | Enterprise Bus |
| EvoPro | EvoPro |
| FFG | F.F.G |
| FR | Freight Rover |
| Fargo | Fargo |
| Fd | Ford |
| FdL | Fleur-de-Lys, Newark |
| Flxible | Flxible |
| Fn | Foden |
| Foton | Foton |
| Ft | Fiat |
| GAC | GAC |
| GER | GER |
| GMC | General Motors Corp (US) |
| GNR | Great Northern Railway (Ireland) |
| GRCW | Gloucester Railway Carriage & Wagon |
| Garford | Garford |
| Garrett | Garrett |
| Gd | Gilford |
| Geely | Geely |
| Global | Global |
| Gloster-Gardner | Gloster-Gardner |
| Golden Dragon | Golden Dragon |
| Goliath | Goliath |
| Goppel | Goppel |
| Graham | Graham |
| Graham Bros | Graham Brothers |
| Graham Dodge | Graham Dodge |
| Gruau | Gruau |
| Guleryuz | Guleryuz |
| Gy | Guy |
| Halley | Halley |
| Hallford | Hallford |
| Hess | Hess |
| Higer | Higer |
| Hn-Cr | Harrington-Commer |
| Hn-Fd | Harrington-Ford |
| Hn-Rolls Royce | Harrington-Rolls Royce |
| Ho | Hino |
| Honda | Honda |
| Hum | Hummer |
| Hyn | Hyundai |
| Hz | Heuliez |
| IH | International Harvester |
| Ibs | Irisbus |
| Io | Iveco |
| Io-Fd | Iveco-Ford |
| Ir | Irizar |
| Is | Ikarus |
| Iu | Isuzu |
| Je | Jonckheere |
| Jn | Jensen |
| Johnstone | Johnstone |
| KL | King Long |
| KMC | Kaisis Motor Company |
| Ka | Setra |
| Kia | Kia |
| Kr | Karrier |
| Kravtex | Kraxtex |
| Ksn | Karsan Otomotiv |
| Kutsenits | Kutsenits |
| LAG | LAG |
| LDAB | Leyland - DAB |
| LDV | LDV |
| LEVC | London Electric Vehicle Company |
| LGOC | London General Omnibus |
| LN | Leyland National |
| LR | Land Rover |
| Laffly | Laffly |
| Lancia | Lancia |
| Ld | Leyland |
| Linkker | Linkker |
| Lion | Lion |
| Ln | Lincoln |
| MABI | MABI-Bus |
| MAN | M.A.N. |
| MB | Mercedes-Benz |
| MCW | Metro-Cammell Weymann |
| MD | Magirus-Deutz |
| MMC | Mitsubishi |
| MMCI | Macedonian Motor Coach Industries |
| Mall | Mallaghan Engineering |
| Marbus | Marbus |
| Me | Mellor |
| Metrocab | Metrocab |
| Mi | Mitsubishi |
| Milnes-Daimler | Milnes-Daimler |
| Minature | Minature |
| Minerva | Minerva |
| Ml | Marshall |
| Mly | Maudslay |
| Ms | Morris |
| Mudan | Mudan Auto |
| Mza | Mazda |
| NAW | NAW |
| NGT | Northern General |
| NGT-AEC | Northern General-AEC |
| Napier | Napier |
| Nn | Nissan |
| Nuk | Nu-Track |
| OBC | Omni Bus & Coach |
| OCC | Omni Coach Company |
| Oe | Optare |
| Ohmio | Ohmio |
| Oldsmobile | Oldsmobile |
| Opel | Opel |
| Optimal | Optimal |
| Otkr | Otokar |
| Overland | Overland |
| PVI | PVI |
| Palladium | Palladium |
| Panhard | Panhard |
| Pegaso | Pegaso |
| Pn | Plaxton |
| Pt | Peugeot |
| Qt | Quest |
| RSJ | Ransomes, Sims & Jefferies |
| Rampini | Rampini |
| Re | Rowe |
| Reo | Reo |
| Rolls Royce | Rolls Royce |
| Royale | Royale |
| Rt | Renault |
| S&D | Shelvoke & Drewry |
| SAIC | SAIC Motor |
| SMC | SMC |
| SOS | SOS |
| Sas | Sanos |
| Saurer | Saurer |
| Sca | Scania |
| Scarnif | Scarnif |
| Seat | Seat |
| Skoda | Skoda |
| Sl | Sentinel |
| Sm | Sunbeam |
| Sn | Seddon |
| So | Saro (Saunders-Roe) |
| Solbus | Solbus |
| Solrs | Solaris |
| SsangYong | SsangYong |
| St | Stewart |
| Star | Star |
| Straker-Clough | Straker-Clough |
| Straker-Squire | Straker-Squire |
| Studebaker | Studebaker |
| Sunlong | Sunlong Bus |
| Suzuki | Suzuki |
| Swit | Switch Mobility |
| TAM | TAM |
| TAZ | T.A.Z. |
| TEC | TEC |
| TSM | Tilling-Stevens |
| Ta | Toyota |
| Tata | Tata |
| Tb | Talbot |
| Tbs | Transbus |
| Tecnobus | Tecnobus |
| Tempo | Tempo |
| Thames Ironworks | Thames Ironworks |
| Tmsa | TEMSA |
| Tn | Trojan |
| Tt | Thornycroft |
| UMW | UMW |
| UNVI | UNVI |
| UTIC | UTIC |
| Unic | Unic |
| VDL | VDL |
| VH | Van Hool |
| VW | Volkswagen |
| Vectia | Vectia |
| Vn | Vulcan |
| Vo | Volvo |
| Vx | Vauxhall |
| W&E | Wales & Edwards |
| W&G Du Cros | W&G Du Cros |
| Wd | Ward |
| Wolseley | Wolseley |
| Wt | Wright |
| Yangtse | Yangtse |
| YoungMan | YoungMan |
| Ytg | Yutong |
| Zhongtong | Zhongtong Bus |