Habr
β
How to become an author
My feed
All streams
Development
Admin
Design
Management
Marketing
PopSci
Search
Write a publication
Settings
Login
Pull to refresh
0
Сергей
@Sergey_22
read-only
User
Send message
Profile
Bookmarks
Belongs to hubs
CRM systems
Usability
Development of communication systems
Information
Rating
Does not participate
Location
Guangzhou, Guangdong, Китай
Date of birth
August 26 1985
Registered
March 14 2013
Activity
December 26 2014 at 11:43