Description
Classroom software for MS-DOS, written by Keystone Learning for adult learners.
Provenance
Donated with the machine it was used on. The label reads ‘Letters’. Rebuilt from 3 damaged copies, none of them complete on its own.
Preservation
- Fixity (SHA-256)
9447534b54f99f9f5573f2b349ed50f317c6b38fe10e0dd20501e5dcdcd2c5d1- Last verified
- Oct 28, 2026, by Vigil
- Emulation profile
- LZE-DOS-12 · lz-x86 core
- Copies
- Three, on two kinds of storage, in two cities
- Original carriers
- Kept in cold storage in Vancouver
Access
Free, in the Lazarus reading room in Vancouver and in partner reading rooms. The license does not permit copies to be taken away.
In the reading room it runs in emulation under profile LZE-DOS-12, from a read-only copy of the recovered image, as it would have on MS-DOS.
Cite as: Keystone Learning, Number Workshop (1987). Lazarus Archive, LZ-00485.