This is a categorized list of 650 categories for the first two digits of the Memory Letters system, grouped into broad areas to ensure scalability and clarity. The categories provide flexibility while leaving room for 50 additional categories for future expansion.
Genealogy and Family History (001–099)
- 001–010: Genealogy Trees (Individual Families)
- 011–020: Family Portraits
- 021–030: Marriage Records
- 031–040: Birth Records
- 041–050: Death Records
- 051–060: Census Records
- 061–070: Military Records
- 071–080: Immigration/Travel Documents
- 081–090: Family Artifacts
- 091–099: Miscellaneous Genealogy
Personal Documents (100–199)
- 100–110: Letters
- 111–120: Journals/Diaries
- 121–130: School Records
- 131–140: Work Records
- 141–150: Legal Documents (e.g., wills, deeds)
- 151–160: Medical Records
- 161–170: Tax Records
- 171–180: Miscellaneous Personal
- 181–199: Reserved for Expansion
Photographs (200–299)
- 200–210: Portraits (Individual)
- 211–220: Family Photos (Groups)
- 221–230: Holiday Photos
- 231–240: Vacation/Travel Photos
- 241–250: Childhood Photos
- 251–260: Wedding Photos
- 261–270: Event Photos
- 271–280: Studio Photos
- 281–290: Miscellaneous Photos
- 291–299: Reserved for Expansion
Historical Documents and Memorabilia (300–399)
- 300–310: Historical Letters
- 311–320: Historical Journals
- 321–330: Certificates (Non-Genealogical)
- 331–340: Maps
- 341–350: Newspapers and Clippings
- 351–360: Advertisements
- 361–370: Recipes
- 371–380: Event Tickets and Programs
- 381–390: Posters
- 391–399: Miscellaneous Historical
Cultural Artifacts (400–499)
- 400–410: Artwork and Sketches
- 411–420: Religious Artifacts
- 421–430: Music (Sheets, Albums)
- 431–440: Books and Manuscripts
- 441–450: Tools and Instruments
- 451–460: Household Items
- 461–470: Clothing and Accessories
- 471–480: Jewelry
- 481–490: Collectibles
- 491–499: Miscellaneous Cultural
Places and Locations (500–599)
- 500–510: Family Homes
- 511–520: Cemeteries
- 521–530: Churches
- 531–540: Schools
- 541–550: Towns and Cities
- 551–560: States and Regions
- 561–570: Countries
- 571–580: Travel Destinations
- 581–590: Historical Landmarks
- 591–599: Miscellaneous Locations
Specialized Collections (600–699)
- 600–610: War and Conflict
- 611–620: Technological Artifacts
- 621–630: Agricultural Items
- 631–640: Maritime/Boating Items
- 641–650: Reserved for Expansion
(Placeholder for additional specialized categories)
Reserved Categories (700–749)
- These numbers can remain unassigned for now to allow flexibility as your collection grows.
Expansion Slot (750–799)
- Placeholder for any future significant category expansions.