Most of the Oracle database server installations traditionally come with a sample schema named Scott and Scott/Tiger as the user name and password to access the default schema. Did you ever wonder why the default username and password in Oracle is Scott/Tiger? Who is that Scott?
Here are the answers from Wikipedia for the questions
Bruce Scott was one of the first employees at Oracle. He is also the co-founder of Gupta Technology (now known as Centura Software) in 1984 with Umang Gupta, and later became CEO and founder of PointBase, Inc.
Bruce was co-author and co-architect of Oracle V1, V2 and V3. The SCOTT schema (EMP and DEPT tables), with password TIGER, was created by him. Tiger was the name of his cat.
That is the history behind the Scott/Tiger of Oracle. They are the names of an architect and his cat.