... and so on.1)Kids’ education: kids’ books, kids land pad, kids maps, stories, growing diaries, audio photo albums…2)Students’ ... …3) Adults’ learning: languages learning, tourism manual, Quran reading, Bible reading, Buddhist reading, audio tally book…4) Special applications: identity ... board design and development;3.The design of books;4.The printing of books;5. Languages adding;6.Adding stealth codes ...