(This is an example otherwise it would go on forever but this is how the dome is set up and how addressing works now)

E: Education
> E-E: Early Years Education/Daycare
> E-M: Elementary
> E-H: Highschool
> E-A: Higher Education
> E-S: Specialized Education

N: Entertainment
> N-F: Family Friendly
> N-R: Retail
> N-G: Grocery
> N-M: Music & Night Clubs
> N-A: Adult

G: Engineering
> G-F: Food Engineering
> G-T: Transportation Engineering
> G-M: Dome Maintenance Engineering

M: Medical
The Medical Sector is composed of the egregiously large Negus Hospital and not much else. It is so large that it has its own addressing and sub sectors within it

> M-A: Administration Ward
> M-S: Medical Sciences Ward
> M-O: Surginal Ward
> M-M: Psychology Ward
> M-E: Emergency Ward
> M-P: Pharmecy Ward
> M-C: Chemistry Ward
> M-T: Technitian Ward (X-Rays, CT Scans, etc)
> M-H: Hospice Ward
> M-Y: Children and Youth Ward
> M-I: Isolation Ward

the list could go the fuck on, you get the picture.