1,tenant
A group of users, used to isolate access to Compute resources(一组用户,用于隔离访问计算资源). An alternative term for a project(替代属于叫项目).

2,user
In Identity Service, each user is associated with one or more tenants(每个用户与一个或多个租户想关联集成), and in Compute can be
associated with roles, projects(alternative Tenant), or both.

generic trem(通常用术语)

3,Virtual Network Computing (VNC)
Open source GUI and CLI tools used for remote console access to VMs

OpenStack cloudCompute glassary术语