U55021 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:
T89022 manifest for SAS Digital Marketing Server Components 6.4
U61021 manifest for SAS Digital Marketing Studio 6.4
U30022 manifest for SAS Digital Marketing Web Studio and Web Reporting Infrastructure 6.4
U62021 manifest for SAS Digital Marketing Logical Types 6.4
U63021 manifest for SAS Digital Marketing Extensions for SAS Customer Intelligence Studio 6.4
T91002 manifest for SAS Customer Intelligence Common Public Type Metadata 6.4
U56024 manifest for SAS Customer Intelligence Common Logical Types 6.4
T92025 manifest for SAS Customer Intelligence Studio 6.4
T93003 manifest for SAS Customer Intelligence Common Server 6.4