I want to know the answer to the following question:
In what decade did computer hardware become able to handle a relational system?
All the background I'm provided with is that "By the early 1990s, however, relational systems dominated in all large-scale data processing applications, and as of 2015[update] they remain dominant : IBM DB2, Oracle, MySQL and Microsoft SQL Server are the top DBMS.". Is that enough to answer the question?