We will describe a very simple and basic relation between optics (lenses in particular) and certain resource allocation problems in project management. In particular, we will discuss the problem of handling slow and fast passengers in airplane boarding. Airlines have practiced a slow first policy (passengers who are experiencing difficulties or have small children travelling with them may board first) and a fast first policy (passengers without overhead bin luggage board first). We will show that, optimally, the queue/row location of slow passengers should take the shape of a thin focal lens in a space-time geometry, for positive mass particles (think electrons) with respect to proper time (aging according to a watch attached to the particle). We will also consider flash drive coding.