Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE course (dept_code VARCHAR)
TABLE: CREATE TABLE department (dept_code VARCHAR)

### Question ###
How many courses are offered by the Computer Info. Systems department?

### Accurate SQL ###

SELECT COUNT(*) FROM department AS T1 JOIN course AS T2 ON T1.dept_code = T2.dept_code WHERE dept_name = "Computer Info. Systems"