The big ones for model scales are 1/24, 1/25, 1/32, 1/35, 1/48, 1/72 and 1/76
Railroad scales you might be able to use are HO = 1/87, O= 1/48 (US) or 1/43 (UK) and G= 1/22-1/26 (it varies a bit)
Some other scales you will see in diecast are 1/24, 1/32, 1/34, 1/43, 1/50 and 1/64 (hot wheels, matchbox, code 3)
For wargaming you will find 15mm (1/100), 20mm (1/72ish), 28mm (about 1/48), and 54mm (about 1/32 or 1/35)
As far as saving posts you can cut and paste it into a word document.