This created a chaotic time for Oracle professionals:
However, it introduced a new frustration. Developers would write code on their 32-bit laptops, move it to a 64-bit production server, and watch it crash. They learned the "Bitness Rule": Your code must match the bitness of your web server process (IIS), which must match the bitness of your Oracle Client. oracle 64 bit client
Today, if you download the Oracle Client, you barely think about it. But that binary file represents a twenty-year journey of shattering limits and rewriting the rules of data. This created a chaotic time for Oracle professionals:
: A mid-sized option that installs the libraries necessary to run applications but excludes development and management tools. System Requirements for 64-bit Client if you download the Oracle Client