The process by which mankind produces, uses and accumulates documentary resources is viewed as a megaphenomenon that has emerged and continues to develop within the framework of the noosphere. After. explication of initial and subsequent notions of the sphere of nous, the question is raised of the properties of its document medium and documentary memory, and directions are outlined for their further investigation. The documentary memory of the noosphere is represented as a global, as well as metaglobal system.. It is characterized as an indispensable element of the attractor that increases the negentropy of the noosphere. The trend is shown towards unity of documentation, in which retraspective information is fixed, and its growing scientific, historical and futurological value. The analysis is supported with corresponding references to scientific works by P. Teilhard de Chardin, E. Le Roy, V. I. Vernadsky, A. L. Chizhevsky, L. Brillouin, as well as representatives of the new wave of noospheric, synergetic and macrosystemic thought-I. R. Prigogine, H. Haken, N. N. Moiseyev, I. D. Kovalchenko, J. Naisbitt, etc.