MatWeb Material Property Data
Datasheets on 64,000 materials from polymers to metals to fiber
NIST Chemistry WebBook via Nat'l Inst. of Standards & Technology
A Guide for System Life Cycle Processes and Activities.
For the new systems engineer, the engineer in another discipline who needs to perform systems engineering, or the experienced systems engineer who needs a convenient reference.
As a member benefit, the SE Handbook Fourth Edition digital copy is available for download from the INCOSE Store to members, employees of CAB organizations, and students of Academic Council members.