This should explain some of the jargon and abbreviations we use on these pages
| Word | Explanation |
|---|---|
| Fully low floor | No steps at the front and middle doors. No steps inside the bus. Usually one, sometimes two or no steps at the back door. |
| Low entry (previously "low floor") | No steps at the front and middle doors. A step or two inside the bus behind the middle door or just before the rear axle and a slope to the rear which is at normal height (2-3 steps). |
| Semi low floor | One step at front and middle doors. A slope to the rear which is at normal height. |
| Normal | Every door has 2 or more steps. A flat floor all the way. |
| HKL | (Helsingin Kapupungin Liikennelaitos) the Helsinki City Transit Company |
| YTV | (Pääkaupunkiseudun yhteistyövaltuuskunta) the Cooperation body for the Helsinki City Region (see information . |
| CNG | (compressed natural gas) A mixture of gases (mostly methane). The cleanest fossile fuel. |
| LPG | (liquefied petroleum gas) Butane and propane compressed to liquid form, also known as bottled gas. A cleaner fuel than normal petroleum. |
| ZF ?HP??? | A button operated automatic transmission made by ZF. The first number indicates the amount of gears and the second refers to the power capacity of the transmission. |