conf.design             Construct symmetric confounded factorial
                        designs.
conf.design-package     Confounded Factorial Block Design
conf.set                Find all confounded effects
direct.sum              Form the direct sum of designs.
factorize               S3 generic function and methods for
                        factorization.
join                    Amalgamate two or more factors.
primes                  Prime numbers
rjoin                   Concatenate designs by rows.
