Disposable women's razor (i.e Bic Soleil)
Disposable men's razor (i.e Schick Quattro)
Electric razor (i.e Braun Waterflex)
Replaceable cartridge men's razor (i.e Schick Hydro)
Replaceable cartridge women's razor (i.e Gillette Venus)
Razor subscription service (i.e Dollar Shave Club)
No razor: waxing or using a depilatory (i.e Nair) is the way to go!