The occupational classifications are based upon those of the Registrar General.
Within each region, the interviews may be clustered in one or two locations. For example, the eleven interviews in region K (Central and North Wales) were actually collected from the area around a village in North Wales called Blaunau Ffestiniog. Tables were produced to show the spread of interviews with regards to occupation, location, region and gender. There is an occupational datasheet for each occupational group, divided according to location, region and gender, and filled in with the appropriate interview numbers. These can be cross-referenced with the card index in order to identify particular interviewees. Each interviewee is defined according to their classifications in 1911, thus not making reference to previous occupations or locations.
| A | Professional | |
| B | Employers and Managers | |
| C | Clerical and Foremen | |
| D | Skilled Manual | |
| E | Semi-skilled Manual | |
| F | Unskilled Manual | |
| G | Unclassfied |
| A | Rural | |
| B | Urban | |
| C | Conurbation (A - Greater London, G - Manchester and Liverpool, M - Glasgow and Edinburgh) |
| A | Greater London | |
| B | Bedfordshire, Hertfordshire, Buckinghamshire, Surry, Kent and Sussex | |
| C | Essex, Suffolk, Norfolk, Cambridgeshire and Lincolnshire | |
| D | Cornwall, Devon, Somerset and Dorset | |
| E | Shropshire, Herefordshire, Worcestershire, Gloucestershire, Oxfordshire, Berkshire, Wiltshire and Hampshire | |
| F | Derbyshire, Nottinghamshire, Staffordshire, Leicestershire, Warwickshire and Northamptonshire | |
| G | Lancashire and Cheshire | |
| H | Yorkshire | |
| I | Northumberland, Durham, Cumberland and Westmorland | |
| J | Glamorgan and Monmouthshire | |
| K | Central and North Wales | |
| L | Highland of Scotland | |
| M | Lowland Southern Scotland |
