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March 31, 1999

2.4.6 I/O unit

The I/O unit facilitates inserting and ejecting cartridges without inter-
rupting normal processing (☞ Figure 2-5:).
Figure 2-5: I/O unit/E
2.5 Cartridges
Each cartridge in the AML/J system can have an external user and
machine readable label for identifying the Volsers (Volume Serial
Number). The external label contains between one and 16 characters for
the Volser. The Volser is composed of the uppercase letters A-Z and the
numbers 0-9. The AML/J system supports different types of label (e.g.
“Code 39” and “STK”).