Seven more, one from the illusive Management Information Systems Handbook (1968): "The consideration of object oriented grouping, i.e. product or customer oriented, will lead to a consolidated file in which practically any element is stored only once" (p. 24)[1].

One near hit in a report from RAND Corp (1969), mentioning the "block-structure/procedure orientation of SIMULA" (p. 13)[2].

A really old one, comparing programming language characteristics (1961, p. 337)[3]: "The group also decided that the following language classification methods are relevant:

- Object, descriptive, command, and mixed languages;

- Languages with stratified and unstratified control;

- Sequential and simultaneous communication languages;

- Problem oriented (behavioral) and machine oriented (structural) languages"

Ref [3] also contains a nice comparison table.

Another compares simulation languages of the time, and from eyeing the tables it seems 'object simulation' may have been the ancestral term (1966): "The basic use of a record is to describe an object in the simulated world. The data in the fields of a record describe the 'properties' of the object. The record and its fields are usually given names or identifications; it is conventional to use names which are mnemonics for the object being represented." (p. 729)[4]

Ref [4]'s language comparison tables are also useful here (p. 730-733).

The next talks about objects in a now familiar way (1967): "We do this by defining the objects that 'live' in the system and assigning attributes to them." (p. 32)[5]

The 'object simulation' ancestry is further supported by the following quote from (1963): "Dynamic representation of an object system. A simulation model of an object system is itself a system whose behavior may be interpreted according to a rule which renders a description appropriate to the behavior of the object system." (p. 2)[6]

More evidence for this from (1964): "The system to be simulated may be regarded as a set of actions which manipulate a set of objects." (p. 328)[7]

[1]: The Archive.org entry says 1969 but the book preface dates 1968. *Hartman, W., Matthes, H., & Proeme, A. (1968). Management Information Systems Handbook: Analysis, Requirements Determination, Design and Development, Implementation and Evaluation (MIS: ARDI). McGraw Hill Text.*

https://archive.org/details/managementinform00hart/page/n565...

[2]: *Kiviat, P. J., & Rand Corporation. (1969). Digital computer simulation: Computer programming languages (p. 0109). Santa Monica, CA: Rand Corporation.*

https://apps.dtic.mil/sti/tr/pdf/AD0684124.pdf

[3]: *Gorn, S. (1961). Some basic terminology connected with mechanical languages and their processors: a tentative base terminology presented to asa x3. 4 as a proposal for subsequent inclusion in a glossary. Communications of the ACM, 4(8), 336-339.*

https://dl.acm.org/doi/pdf/10.1145/366678.366682

[4]: *Teichroew, D., & Lubin, J. F. (1966). Computer simulation—discussion of the technique and comparison of languages. Communications of the ACM, 9(10), 723-741.*

https://dl.acm.org/doi/pdf/10.1145/365844.365851

[5] *Kiviat, P. J. (1967). Digital computer simulation: Modeling concepts. Santa Monica, Califorinia: Rand Corporation.*

https://apps.dtic.mil/sti/pdfs/AD0658429.pdf

[6]: *Lackner, M. R. (1963). The dependency of a simulation language on a theory of systems. System Development Corporation.*

https://apps.dtic.mil/sti/pdfs/AD0296590.pdf

[7]: *Williams, J. W. J. (1964). ESP The Elliott Simulator Package. Comput. J., 6(4), 328-331.*

https://academic.oup.com/comjnl/article/6/4/328/375742