1.) 'Q' and 'X' were removed from the alphabet, entirely.  Substitute letter combinations 'cw' and 'cs' have been created for those characters, but are not necessary- freeing up those keyboard keys for other uses.

2.) 'G' and 'J' were combined into a single character ("Jac").  'C' and 'K' were also combined into a single character ("Sic").  Each combination has been assigned to both standard character keys.

3.) Each alphabetical character was streamlined for writing (or plotting), and can be created with just a single line.

4.) Capital and lower-case characters are exactly the same form, but half the size- with jac, 'p', and 'y' retaining their lower-case drop-positions.

5.) Confusion with numerals has been corrected by changing similar characters.

6.) Foreign characters and symbols have generally been left alone, as the various extra accents don't work well with Jac.