This is the Oracle information :

-Oracle Database 10g Express Edition (Universal)
OracleXEUniv.exe (216,933,372 bytes)

-Oracle Database 10g Express Client
OracleXEClient.exe (30,943,220 bytes)

Client software to be installed on client systems for remotely accessing Oracle Database 10g Express Edition. You do not need to install the client onto the same computer as Oracle Database 10g Express Edition.