Cells perform millions of Boolean logic operations every second using multiple independent codes with stringent formal rules instantiated on DNA, RNA, proteins, sugars, and membranes. These codes rely on elementary and concatenated symbols to define variables and values that can be written, deleted, and read from long- and shortterm memory. Computer and cellular variables are used with control structures such as "GoTo," subroutine calls, "wait," and to initiate and terminate iteration loops. They have well-defined data types and allowed operations. Values can be structured in arrays and linked lists. Although variables are identifiable in cells, logic is executed without a readable source code, using hardwired biochemical components and inherited molecular machines (MMs). Each code requires unique decoding MMs, and cellular codes interoperate to incorporate details located throughout the cell to permit holistic correct decisions. Tight integration between these codes is implemented using adaptor biomolecules. DNA, RNA, and proteins are used to define both variables and values for independent codes, often in overlapping regions. These biomolecules are also needed to create MMs, adaptors, and the rest of the infrastructure.