Technical reports can be useful in engineering, they can be more detailed than a journal article though are not usually peer reviewed. Conferences can be published in Technical Report series.
We have good collections from NASA (mostly online) and the European Space Agency (print and CD).
A correctly formatted reference will tell you exactly where to find the full report:
Estlin, T. (2006). Plan Execution Interchange Language (PLEXIL), NASA/TM-2006-213483. Moffett Field, CA: NASA Ames Research Center.
This article was written by T. Estlin, and the report's title is "Plan Execution Interchange Language (PLEXIL)". It was published in 2006 in the by the NASA Ames Research Cente in Moffett Field, CA. The report number is NASA/TM-2006-213483.
Found a good technical report? Now you need to know whether you can get hold of it?
Search Library Search for the report series / organisation.
If we don't have the conference (paper) or technical report you need it's worth a searching Google to see if there's a free/open access version somewhere.
If not you can request it via our Inter-Library Loans service.
The majority of the collection is at Hartley Library (Reports T, Level 1), with some holdings at other sites.
Since 2009 individual reports are consistently on Library Search, prior to this there is only a record for the series as a whole.