Security of APL applications packages. - Paul Penfield Jr. (APL, 1972)

Use of APL in teaching electrical network theory. - Paul Penfield Jr. (APL, 1972)

An APL interpreter written in APL. - Paul Penfield Jr. (APL, 1975)

APL symbols. - Paul Penfield Jr. (ACM SIGAPL APL Quote Quad, 1975)

Notation for complex "part" functions. - Paul Penfield Jr. (ACM SIGAPL APL Quote Quad, 1977)

Extension of APL primitive functions to the complex domain. - Paul Penfield Jr. (ACM SIGAPL APL Quote Quad, 1977)

Complex APL: comments from the APL community. - Paul Penfield Jr. (ACM SIGAPL APL Quote Quad, 1978)

Design choices for complex APL. - Paul Penfield Jr. (ACM SIGAPL APL Quote Quad, 1978)

Proposal for a complex APL. - Paul Penfield Jr. (APL, 1979)

AIDS, APL integrated-circuit design system. - Paul Penfield Jr. (APL, 1981)

Principal values and branch cuts in complex APL. - Paul Penfield Jr. (APL, 1981)

Signal delay in RC tree networks. - Paul Penfield Jr.; Jorge Rubinstein (DAC, 1981)

Signal Delay in RC Tree Networks. - Jorge Rubinstein; Paul Penfield Jr.; Mark A. Horowitz (IEEE Trans. Comput. Aided Des. Integr. Circuits Syst., 1983)

Recent Results in VLSI CAD at MIT. - Richard E. Zippel; Paul Penfield Jr.; Lance A. Glasser; Charles E. Leiserson; John L. Wyatt Jr.; Jonathan Allen (FJCC, 1986)