Olá Vamshi,
Como você perguntou sem nenhum contexto, PSL provavelmente significa Product Service Letter. É usado na Gestão de Serviço ao Cliente para Produtos de Consumo. Por favor, consulte o link SDN [PSL Management|https://www.sdn.sap.com/irj/sdn/bpx-consumerproducts?rid=/business_maps/guid/eg1slxvyat1odhrwoi8vzxn3b3jrcgxhy2uuc2fwlmnvbs9zb2nvdmlldy9ty3bnzxquyxnw%0d%0ap3bhy2thz2vpzd0mdmlldz1zbwnyzw5kzxiyjmlkptazndyxotvcn0uzodq5qki4qtuwqtu5rjy4%0d%0aodvdouu1jiz4c2wtymfzzt1odhrwoi8vzxn3b3jrcgxhy2uuc2fwlmnvbs9zb2nvdmlldy9ty3bn%0d%0azxrfbwltzs5hc3a/dxjspxnkbl9uzxcvjiz3zwitdxjspwh0dhbzoi8vzxn3b3jrcgxhy2uuc2fw%0d%0almnvbs9zb2nvdmlldy9ty3bnzxrfbwltzs5hc3a/dxjspsymehnslwxpc3q9c2rux2dlbmvyywxf%0d%0acmvuzgvylnhzbhq7c2rux2xpbmtyzxdyaxrpbmcuehnsddtnzw5lcmf0zuhutuxfu0rolnhzbhqm%0d%0ajnbhy2thz2utawq9jizyzxnvdxjjzxr5cgu9c2rux3nvbhv0aw9ux2nvbxbvc2vyx2z1bgxwywdl%0d%0ajizwyxjlbnrssuq9l3dlymnvbnrlbnqvd2vicgfnzxmvynb4lzqwieluzhvzdhjpzxmvq29uc3vt%0d%0azxiguhjvzhvjdhmvu29sdxrpb24gtwfwic0gq29uc3vtzxigrhvyywjszxmgjibib21liefwcgxp%0d%0ayw5jzxmmjnrpdgxlpvbyb2r1y3qgu2vydmljzsbmzxr0zxigtwfuywdlbwvudcymdmlydhvhbd10%0d%0acnvl&prtmode=default] que pode ajudá-lo com mais detalhes.
Easwar Ram