It has been operational since an early hour this morning.

It has been operational since 2007, with a first class of around 100 students.

Both water supply schemes have been operational since the mid-1960s.

It is the second theme park project from the group and has been operational since October 2005.

The early education program was founded and has been operational since 1968.

The school was officially opened in 1986 but has been operational since 1981.

An e-mail discussion list has been operational since February 1997.

The project started in 1999 and has been fully operational since May 2001.

However the cruiser has not been operational since the early 2000s.

This system was developed throughout the 1990s and has been fully operational since 1998.