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://attlas.farafile.ir/file/32058/پاورپوینت-آموزش-نرم-افزار-spss-و-کار-با-داده-ها-و-توابع-در-spss