Draper (later nicknamed Captain Crunch), his friend Joe Engressia (also known as Joybubbles), and blue box phone phreaking hit the news with an Esquire magazine feature story. This was an early example of a kind of sportive, but very effective, debugging that was often repeated in the evolution of APL systems. In their documentation they acknowledge their gratitude to "a number of high school students for their compulsion to bomb the system". They modeled their system after APL/360, which had by that time been developed and seen substantial use inside of IBM, using code borrowed from MAT/1500 where possible. Science Research Associates undertook to write a full APL system for the IBM 1500. This first informal network penetration effort was later acknowledged as helping harden the security of one of the first publicly accessible networks: Eventually, curiosity drove the students to explore the system's wider context. They were free to explore the system, often using existing code available in public Workspaces as models for their own creations. Working independently, the students quickly learned the language and the system. The APL network system was structured in Workspaces which were assigned to various clients using the system. In the Fall of 1967, IBM (through Science Research Associates) approached Evanston Township High School with the offer of four 2741 Selectric teletypewriter based terminals with dial-up modem connectivity to an experimental computer system which implemented an early version of the APL programming language.
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