The results were documented in the Rainbow Series. Rather than separating the EAL and functional requirements, the Orange Book followed a less advanced approach defining functional protection capabilities and appropriate assurance requirements as single category. Seven such categories were defined in this way.
The findings were documented in the Rainbow Series.  Instead of dividing the EAL (Evaluation Assurance Level) and functional requirements, the Orange Book took a simpler approach by grouping functional protection capabilities and required assurance levels into a single category. This resulted in seven distinct categories being defined.