Spain, Sept. 8 -- Spain based SISTEMAS INFORMATICOS ABIERTOS, S.A.U. has secured contract from Direccion del Servicio de Gestion Economica de la Agencia Estatal de la Administracion Tributaria for System maintenance services - ADVA Multiplexer Maintenance Service of the Tax IT Department of the AEAT . The value of the contract is worth 150734.36 EUR .
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