Hunt and peck typing
The most common form of typing is "hunt and peck" (also known as two-fingered typing) which is slower than touch typing because, instead of relying on the memorized position of keys, a typist is required to find each key by sight.
Use of this method also prevents the typist from being able to see what has been typed without glancing away from the keys. Although good accuracy may be achieved, any typing errors that are made may not be noticed immediately (if at all).
There are many idiosyncratic typing styles in between "hunt and peck" and touch typing; for example many people will type blindly, but use only two to five fingers, and not always in a systematic fashion.