C19005 is a "container" hot fix that contains "member" hot fixes which will update your SAS software components.
See "What is a container hot fix?" in the SAS Hot Fix FAQ for more information on container and member hot fixes.
A manifest listing the contents of each of the following "member" hot fixes is available:
C27005 manifest for SAS Marketing Optimization Mid-Tier 5.3_M3
C26001 manifest for SAS Marketing Optimization Server 5.3_M2