It is available for Oracle Solaris, Linux x86-64, Microsoft Windows (x64), IBM AIX, and HP-UX. Oracle Software Delivery Cloud (Edelivery)
is a legacy version (extended support ended in 2018, with sustaining support ended in 2022). You cannot download it from Oracle directly without a valid Oracle Support contract that covers this version. It is available for Oracle Solaris, Linux x86-64,