The study of electromagnetic nucleon production experiments of the type A and A is an active field. One of its major goals is the study of the limitations of the mean-field picture for nuclei. Two-nucleon knockout experiments offer the opportunity to study central and tensor correlations in nuclei. The extraction of physical information from the data is not a straightforward exercise and involves theoretical modeling. Results of , and semi-exclusive calculations will be presented. The role of two-nucleon photoabsorption mechanisms for the extraction of spectroscopic factors from exclusive A processes will be discussed.