Game or software applications always need to be made usability testing by professionals before going public. Only in this way, can the development of software be completely finished. And this needs a lot of people to cooperate to complete the usability testing, so the testing process always costs a large amount of time; or has to invite others to make tests spending a lot of money.

First of all, AppNee wants you to know - this classic book does not necessarily apply to everywhere or everything, but they are always worth to taste again and again. The Design of Everyday Things (DOET for short) formerly was titled 'The Psychology of Everyday Things' (POET for short) that was initially published in 1988). This Revised and Expanded Edition was published in 2013, as a major update of this bestseller.