End-to-end encryption and privacy controls.
Message and call for free* around the world.
Group conversations made simple.
Say it with stickers, voice, GIFs and more.
Reach your customers from anywhere.
http://daneshgraphic.farafile.ir/file/22247/خلاصه-کتاب-مدیریت-اسلامی-دکتر-افجه-ای--نمودارهای-درختی