Env: what Scope objects ought to be renamed to.
The error is long-standing in E's design, but User:Markm did not not want to use the technically correct “environment” since it was rather lengthy to write in code. User:Kevin Reid advocates using “Env”, this being both correct and short.
XXX Expand this with actually explaining the protocol of Env objects. Also see Thomas Leonard's proposal that Scope objects in E-on-Java remain what they are for implementation efficiency while Envs have the nice user-facing and GBA-providing protocol.