In the early days of Disneyland, you didn't just pay
a general admission fee, you had to buy tickets for the rides
Ride Coupons, often called tickets, were required to go on
most attractions at Disneyland. There were A, B, C, D, and E
tickets. A being the worst ticket, for the more slow rides, and
E, being the best ticket, used for more thrilling attractions.
To save money, a guest could buy a book
of coupons, sold at Ticket booths throughout the park.
The type of ticket required for an attraction could change
over the years. For example, America Sings and the Mine Train
were both taken from an "E" ticket, to a "D"
ticket, before both finally closing.
Disneyland gradually phased out the ticket method, in 1981,
due to the competition of nearby Six Flags: Magic Mountain; which
charged a full-admission one time fee.