LARGE SCALE GUIDANCE INFORMATION SUPPORT SYSTEMS MAY MEET THE PROBLEMS POSED BY THE INFORMATION EXPLOSION AND CYBERNATION. ASSUMPTIONS ABOUT COUNSELING, THE ROLE OF THE COUNSELOR, THE CLIENT, DECISION-MAKING, VOCATION AND EMPLOYMENT, AND GUIDANCE INFORMATION SYSTEMS ARE REVIEWED. THESE ASSUMPTIONS PROVIDE THE RATIONALE FOR THE SUGGESTIONS MADE. BECAUSE GUIDANCE INFORMATION AVAILABLE TO THE COUNSELOR IS LIMITED (SOURCES BEING OCCUPATIONAL BRIEFS, COLLEGE CATALOGS, SCHOLARSHIP DATA, AND HIS OWN DIRECT AND VICARIOUS EXPERIENCE WITH THE WORLD OF WORK), GUIDANCE INFORMATION SYSTEMS WHICH ARE COMPLETE AND FLEXIBLE, WITH PROVISIONS FOR INPUT AND UP-DATING, SHOULD BE DEVELOPED. THE COUNSELOR CAN BE A SIGNIFICANT INFORMATION SOURCE FOR STUDENTS IF HE ACCEPTS THE CONCEPT OF MAN MACHINE SYSTEMS. SYSTEMS WHICH COULD BE DEVELOPED INCLUDE EDUCATIONAL OCCUPATIONAL INDEX SYSTEMS, OCCUPATIONAL INDEX SYSTEMS, OCCUPATIONAL OPPORTUNITY SYSTEMS, COLLEGE ACCESS MONITORING SYSTEMS, AND GUIDANCE RESEARCH AND DEVELOPMENT SYSTEMS. FEDERAL FUNDING ON A PROGRAMMATIC BASIS IS URGED. THE USEFULNESS OF INFORMATION SYSTEMS COULD BE MAXIMIZED BY RESEARCH IN THE FOLLOWING AREAS--AMOUNT OF INFORMATION, PRESENTATION OF OCCUPATIONAL AND EDUCATIONAL INFORMATION, AND "PERSONAL INTELLIGENCE." THIS PAPER WAS PRESENTED AT THE COLLEGE ENTRANCE EXAMINATION BOARD INVITATIONAL CONFERENCE ON THE PREPARATION OF SCHOOL COUNSELORS (CHICAGO, FEBRUARY 25, 1966). (WR)