Comment Amiga User Interface Style Guide (Score 1) 338
Commodore's Amiga User Interface Style Guide was really good in its day, and though of course Amiga-specific, it pushed hard for consistency and clarity of communication to the user in the little details such as when to 'gray out' inapplicable menu items, buttons, etc:
Amazon link
I think it's still worth a read if you can get it cheap. Amiga applications benefitted greatly from the Style Guide, even if criticism of a particular developer's app might have come only from a third party who'd read the book. Developers appreciated the way other "Style Guide-compliant" apps worked so nicely together and adapted their programs to suit, resulting in the majority of applications becoming consistently laid out, and therefore very intuitive, for the end user.
Amazon link
I think it's still worth a read if you can get it cheap. Amiga applications benefitted greatly from the Style Guide, even if criticism of a particular developer's app might have come only from a third party who'd read the book. Developers appreciated the way other "Style Guide-compliant" apps worked so nicely together and adapted their programs to suit, resulting in the majority of applications becoming consistently laid out, and therefore very intuitive, for the end user.