SAP ABAP kai fa ji shu xiang jie/ SAP ABAP kai fa ji shu xiang jie / Lv you kai fa ji shu xiang jie. Hadoop ying yong kai fa ji shu xiang jie / Hadoop ji shu xiang jie/ Hai yang kai fa ji shu ci dian/ Jin hai kai fa ji shu ci dian/ Wu lian wang TCP/IP ji shu xiang jie/ Web kai fa ji shu cong shu Web kai fa ji shu cong shu.