This report provides a brief general description of ESCWA Statistical Information System ( ESIS), including technical detail of the structure, principal features and utilization modalities, in addition to technical material aimed at facilitating effective use of this System. Within that context, ESIS was developed essentially for use both within ESCWA and by institutions and individuals concerned with economic and social development in the ESCWA region. It is for this latter purpose that a version of ESIS will be posted on the Web.