Scrapbooking Desk

I am looking to buy an HP computer (desk top). What do all the model #’s mean??? Like “A1640N”, “m7463w” etc?

I will use computer for Scrapbooking, photography, my website to scan in my work, e-mail etc. I am very “computer illiterate”, so please respond in plain english! HA, HA!
OR what do you suggest computer [...]