The traditional system in the UK had four ranks: lecturer, senior lecturer, reader, and professor. Depending on who you ask, a reader was either equivalent to U

The traditional system in the UK had four ranks: lecturer, senior lecturer, reader, and professor. Depending on who you ask, a reader was either equivalent to US full processor or between associate and full professor. For example, when Cambridge switched to the assistant / associate / full ranks a couple of years ago, readers became professors.