Fable
The great scribe's body was split into many storage boxes
The capital's calculation academy needed to revise a huge ephemeris. At first, every apprentice carried the full set of base registers, error-correction books, and abacus records, and the desks were piled up like small mountains. With few people it was still tolerable, but as the number of people grew, the room became crowded first, and page-turning became astonishingly slow.
The director first bought a large cabinet, then told the apprentice to calculate fewer pages. The cabinet quickly filled up again, and calculating fewer pages slowed overall progress. Worse, everyone took the full set of booklets, so any single change had to be copied to everyone—miss one entry, and the entire ephemeris wouldn't match up.
The old accountant proposed the ledger-splitting method. A was responsible only for the spring star charts, B only for summer, C kept one section of the error-correction book, and D kept one section of the abacus records. Normally each person memorized only their own part, and only when a certain page had to be reconciled were the relevant ledger pages temporarily borrowed onto the table and returned immediately after use.
At first the apprentice worried: without the whole book in hand, how can one proofread the whole book? The first edition's fascicles really did get messy. Someone borrowed the summer star chart and forgot to return it, while another person sat idle at the desk; someone got an old correction ledger and their results didn't match everyone else's.
The old accountant added rules for borrowing order, return marks, and temporary combined volumes. When joint calculation was needed, the relevant pages briefly gathered on the same desk; once the calculation was done, they were immediately split back into their respective storage boxes. No one had to carry the whole mountain of books year-round, yet at critical moments they could see the pages they needed.
The ephemeris could finally be revised by more apprentices together. The cost was that scheduling became more demanding: slow book borrowing caused waiting, and wrong marks caused chaos. The calculation academy did not make each person more capable of carrying the load; instead, it split the great book into manageable shares and briefly reassembled them when needed.
The director later took on a larger ephemeris, and no longer first asked whether the room could hold the whole book. He first asked which volumes should be assigned to whom, when to aggregate, and when to release. Large tasks can scale because of shared memory and clear scheduling.
Later the apprentices also invented a waiting bell. Anyone who wanted to merge volumes temporarily had to ring the bell to reserve; anyone who did not return a volume after use would see a red card light up by the desk. As the volume-splitting method matured, everyone understood more clearly that the big book had not disappeared after being split—it simply used stricter scheduling to avoid making everyone run around carrying the whole book.