A Binary Large Object BLOB is a binary data stored as a single entity - i.e. BLOB can be an audio video or Presentation itself. A number of techniques are used to optimize memory consumption while working with BLOBs - which was already stored in the Presentation or be added later programmatically. Using IBlobManagementOptions./iblobmanagementoptions you can change a different behavior aspects regarding BLOBs handling for the IPresentation./iPresentation instance lifetime....can be an audio, video or presentation itself. A number of techniques...was already stored in the presentation or be added later programmatically...