An in addition to that, a vast majority of documents are lists which consist of a "header" (1 to 3 words) and word-number pairs afterwards. An another common class are small clay seals with 1, 2 characters carved into them. It's likely that in both cases, we may be dealing with abbreviations.

Some of the lists end with "ku-ro" and a number that's the sum of all the previous numbers, oddly frequently off by one.