I found this page "http://download.oracle.com/docs/cd/B19306_01/server.102/b14357/ape.htm", which says I need two packages:
Download the zip files containing the SQL*Plus Instant Client package, and the OCI package from the OTN Instant Client page at http://www.oracle.com/technology/tech/oci/instantclient/instantclient.html. Both packages must be from the same version such as 10.2.0.1.
So I found "instantclient_11_2" and downloaded a zip file, but I can't find OCI. It keeps saying to download, you go to that instantclient.html page, but that page doesn't have an OCI download. What gives?