Multiple SAP instance on single server.

Hello Experts.

We are in process of implementaing SAP solution withLandscpe having systems ECC 6.0, SolMan 4.0, BI. We are planning to have 3 Sytem landscape for all.

Now but currently we are having only one Physical server

Is it possible to Install 6 SAP system on single server?(DEV and QAS for ECC, Solman, BI respectively). The server is having sufficient hardware for 6 system as per sap standered. Planne OS is RHEL and DB MaxDB. Initially we are having 16 GB RAM extendable.

Will SAP support such kind of landscape?