For every infinite Loop Space Machine , there is a natural equivalence of spectra between and Segal's spectrum .
References
May, J. P. and Thomason, R. W. ``The Uniqueness of Infinite Loop Space Machines.'' Topology 17, 205-224, 1978.
Weibel, C. A. ``The Mathematical Enterprises of Robert Thomason.'' Bull. Amer. Math. Soc. 34,
1-13, 1996.