The document discusses T cell receptor development and evaluation methods. It provides an overview of T cell development including the development of alpha beta and gamma delta T cells from germline genes. It also discusses the rearrangement of variable, diversity, and joining domains in T cell receptor genes. Evaluation methods discussed include CDR3 length analysis using immunoscope technology, clonotypic TCR tracking through peptide stimulation and sorting of T cells, and microarray analysis of beta chain repertoire.