Unlike most written languages, LoCoS represents concepts rather than sounds — in this way it in fact has much in common with some of the earliest proto-writing systems.
The basic building blocks are simple, modifiable shapes that each represent an idea, person or place.
LoCoS has a simple and logical system for representing abstract ideas. Once you know the base symbol, related symbols — with visually logical modifications — are easy to understand and remember.
For more on this idiosyncratic but fascinating “language without letters,” read the following piece by Australian graphic designer Cris Gaul:
Via bibliophile and rare book collector Incunabula.
Somewhat related from the archives: Hobo signs and symbols.