Much like a standard Search Engine works (Google, Yahoo!, Bing, etc). For standardisation on the site,
TS 400 is referred to as TS400, DPC 6400 as DPC6400.
If you are searching by part number, the part numbers for Stihl are in the format 1234 456 7890,
Partner / Dolmar / Makita / Husqvarna are in the format 123 45 67-89 or 123 45 67 89.