1290	 Transparent-Mode Control Procedures for Data Communication Using the American Standard Code for Information Interchange -A Tutorial	 This paper gives the considerations of Task Group X . . in the area of transparent-mode data communication control philosophy. The appearance of this paper was forecast underthe name of second-level control in the earlier tutorial paper Control Procedures for Data Communications Task Group document X . . . dated May . The present paper elaborates upon solutions to the problems of transparency to the basic ASCII communication control characters as outlined in the previous paper mentioned above. Moreover it goes on to cover the additional control problems of handling material such as off line encrypted data or non-ASCII codes by means of systems providing complete character transparency. It does not cover concepts of transparency in which the normal character structure or modulation rate of a system may be abandoned. In conjunction with the earlier tutorial paper this paper is expected to lead to a proposal for stand ardizationof data communication control procedures using the American Stand ard Code for Information Interchange.
