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://farathesis.farafile.ir/file/26255/پاورپوینت-آموزش-روش-تصمیم-گیری-چند-شاخصه-(topsis)