| 1968 | On the Computation Time of Finite Functions | Philip M. Spira |
| 1968 | Simple Computation-Universal Cellular Spaces and Self-Reproduction | Alvy Ray Smith III |
| 1968 | An Algorithm for Minimizing Read Only Memories for Machine Control | Scott J. Schwartz |
| 1968 | Two-Type Bracketed Grammars | Mario Schkolnick |
| 1968 | Syntax Directed Mappings of Context-Free Languages | Luigi Petrone |
| 1968 | Infinite State Probabilistic Transition Tables and Chains Ergodic Properties | Azaria Paz |
| 1968 | Structural Equivalence and LL-k Grammars | Marvin C. Paull, Stephen H. Unger |
| 1968 | On a Measure of Complexity for Stochastic Sequential Machines | T. T. Nieh, Jack W. Carlyle |
| 1968 | Use of Multiple Index Matrices in Generalized Automata Theory | David E. Muller |
| 1968 | Lupanov Decoding Networks | Amar Mukhopadhyay |
| 1968 | On Computational Speed-Up | Albert R. Meyer, Patrick C. Fischer |
| 1968 | Output Functional Computational Structures | Fred L. Luconi |
| 1968 | A Transform Approach to Logic Design | Robert J. Lechner |
| 1968 | A Characterization of Some Asynchronous State Assignments | Larry L. Kinney |
| 1968 | Universal Connecting Networks and the Synthesis of Canonical Sequential Circuits | William H. Kautz, James Turner |
| 1968 | Some Formal Properties of a Class of Non-Deterministic Program Schemata | Takayasu Ito |
| 1968 | The Uniform Halting Problem for Generalized One State Turing Machines | Gabor T. Herman |
| 1968 | Structure of Undecidable Problems in Automata Theory | Juris Hartmanis, John E. Hopcroft |
| 1968 | Checking Automata and One-Way Stack Languages (Extended Abstract) | Sheila A. Greibach |
| 1968 | Derivation-Bounded Languages | Seymour Ginsburg, Edwin H. Spanier |
| 1968 | Two-Way Balloon Automata and AFL | Seymour Ginsburg, John E. Hopcroft |
| 1968 | Limited Random Access Turing Machines | Michael J. Fischer, Arnold L. Rosenberg |
| 1968 | Tape Reversal Complexity Hierarchies | Patrick C. Fischer, Juris Hartmanis, Manuel Blum |
| 1968 | Grammars with Macro-Like Productions | Michael J. Fischer |
| 1968 | The Linearity of Sequential Machines: A Critical Review | Wayne A. Davis |