<P> In typography , a counter is the area of a letter that is entirely or partially enclosed by a letter form or a symbol ( the counter-space / the hole of ) . Letters containing closed counters include A , B , D , O , P , Q , R , a , b , d , e , g , o , p , and q . Letters containing open counters include c , f , h , i , s etc . The digits 0 , 4 , 6 , 8 , and 9 also possess a counter . An aperture is the opening between an open counter and the outside of the letter . </P>
<P> In typography , a counter is the area of a letter that is entirely or partially enclosed by a letter form or a symbol ( the counter-space / the hole of ) . Letters containing closed counters include A , B , D , O , P , Q , R , a , b , d , e , g , o , p , and q . Letters containing open counters include c , f , h , i , s etc . The digits 0 , 4 , 6 , 8 , and 9 also possess a counter . An aperture is the opening between an open counter and the outside of the letter . </P>
white space located inside letters like o and p
white space located inside letters like o and p
closed counters
closed counters