The Cray model roadmap 1976 - today
Cray-1, X-MP, Y-MP (first GFLOP in 1989)
then a split on the product line
Vector/Scalar - C90, T90, J90, SV1, SV1ex (the SVs were SGI's aspirations after buying Cray in 1996 for some $750M and 3 yrs later selling it off for $50M)
MPP (1000's of processors) - T3D, T3E, T3E-1200 (first sustained TFLOP), T3E-1350
then product line collapsed to one and continued on as...
High Bandwidth MPPs - Cray X1, X1e, XT3, XT4, XT5/XT5h, ...... onto PFLOP hardware maybe by 2010