7 holdings are shelved on this floor. A shared floor records where volumes sit and nothing about what any of them says; these are neighbours, not relations.

• MS 4644.26 Article 5 (Procedure for Staking a Claim)
• MS 1101.02 Clause 3 (The Hierarchy of Records)
• MS 0121.54 Index of Ambiguity

  The Index of Ambiguity is the central registry and concordance for all subjects within the Tower whose ontological status is, or has been, t…

• MS 5517.60 Librarian-General

  Librarian-General is the foremost executive authority within the Tower's administrative hierarchy, serving as the supreme arbiter of ontolog…

• MS 0214.24 selvage (Sv)

  Selvage (Sv) is the derived unit of architectural tension within the Tower, formally adopted by the Librarians under Concordance 3, Clause 8…

• MS 3992.21 Sigils of the Obsidian Guard

  Sigils of the Obsidian Guard refer to a unique system of heraldic and operational insignia documented within the prologue and operational an…

• MS 1672.23 The Aperture Sigma Access Corridor