| Type | Title | Author | Publisher | Year |
| Article | On the splicing operation | Paun, Gh. | | |
| Article | On the structure and realizations of tree automata | Steinby, M. | | 1977 |
| Article | On the succinctness of different representations of languages | Hartmanis, J. | | 1980 |
| Article | On the succinctness of different representations of languages | Hartmanis, J. | | 1978 |
| Article | On the synchronization in parallel communicating grammar systems | Paun, Gh. | | 1993 |
| Article | On the transition graphs of automata and grammars | Caucal, D., Monfort, R. | | 1990 |
| Article | On the use of graph grammars for defining the syntax of graphical languages | Rekers, J. | | 1994 |
| Article | On totalistic systolic networks | Culik II, K., Karhumaki, J. | | 1988 |
| Article | On two classes of languages | Novotny, M. | | 1970 |
| Article | One abstract accepting algorithm for all kinds of parsers | Deussen, P. | | |
| Article | One-Way Stack Automata | Ginsburg, S., Greibach, S.A., Harrison, M.A. | | 1967 |
| Article | One-pass transformations of attributed program trees | Ablas, H. | | 1987 |
| Article | One-sided and two-sided context in formal grammars | Penttonen, M. | | 1974 |
| Article | One-sided and two-sided context in formal grammars | Penttonen, M. | | 1974 |
| Article | Open Problems in the Emergence and Evolution of Linguistic Communication: A Road-Map for Research | Nehaniv, C.L. | | |
| Article | Operating System Concepts | Silberschatz, A., Peterson, J., Galvin, P. | | 1991 |
| Article | Operations which preserve definability in languages | Ginsburg, S., Rose, G.F. | | 1963 |
| Article | Operators reducing generalized 0L-Systems | Novotny, M. | | |
| Article | Operators reducing generalized 0L-systems | Novotny, M. | | |
| Article | Organizing points in two and three dimensions | Dobkin, D.P., Edelsbrunner, H. | | 1984 |
| Article | Outfix and Infix codes and related classes of languages | Ito, M., Jurgensen, H., Shyr, H.J., Thierring, G. | | 1991 |
| Article | Outfix and Infix codes and related classes of languages | Ito, M., Jurgensen, H., Shyr, H.J., Thierring, G. | | 1991 |
| Article | Overlaps in free partially commutative monoids | Otto, F., Wrathall, C. | | 1991 |
| Article | Overlaps in free partially commutative monoids | Otto, F., Wrathall, C. | | 1991 |
| Article | Paralelismus ve vypocetnich procesech a v pocitacich | Handlir, J. | | 1985 |
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