资料：HS ensures there is a clear career path for any employee, from any background. Three key levels in Harrods are the sales employee, department managers and senior managers. At each level, employees can benefit from the development programs in order to build a career.

James is a sales Associate and one of HS first Sales Degree students. When an injure prevented him from following his previously chosen career in contemporary dance, he applied to HS. He has never looked back. HS training has given him transferable skills. He has been able to work within more than one department, providing the same high levels of experience.

What are the three key levels in HS?