???????????г?????????????????????Skype??????罻????б???????????????????????????????????????Outlook.com???????????(???)??Facebook???????????????????????????Skype?С?
????????????????????????????б????δ????????????Outlook.com????????????У?????????????Facebook?????????????????????“GoogleChat”??“Facebook Chat”??
????GoogleChat?????GTalk??????????????????????????Windows?????????????ζ??GTalk?????????????????????????????δ??????軔????????????????????????Hangouts?????????
??????????????????Facebook????????????????δ???????
???????????δ????Outlook.com????????????????????У?????????????????????Skype?????????Skype??????????????顣
???????????????θ?????????????????????????????Facebook????????????????????????????????
????????????г???WhatsApp??Snapchat??????Line??KakaoTalk??BBM??????????罻????????????????????????????????
?????????????п??y?屨???????????WindowsPhone???????е???????“Rooms”????Windows10???У???????????????????????????????????з????????Windows10?У??????????????Skype????????????????????GroupMe??
??????????μ?Skype???????????????????????????????????????綽??????綽?????Skype?????????????罻????????????????????????????
?????????????????????罻????????WhatsApp???′?????????????????????????????iOS????????iMessage?????????衢?????Щ?????г???????????????????????