Thrustmaster of Texas, Inc.
Manufacturer of marine propulsion units, including mechanical, hydraulic, tunnel thrusters, z-drives, jet thrusters, and retractable thrusters, along with portable dynamic positioning systems.
http://www.thrustmastertexas.com

Centrospazio
A space technology research laboratory specialized in Electric Propulsion development and testing: Hall thrusters, FEEP systems, MPD thrusters, arcjets.
http://www.centrospazio.cpr.it

Max Power
Bow and stern thrusters for a complete range of tunnel retractable, electric, hydraulic thrusters by Max Power in Cannes-Mandelieu France.
http://www.max-power.com

Florida Bow Thrusters
Florida Bow Thrusters, Inc. offers nationwide sales, service and quick installation of a full range of electric and hydraulic bow and stern thrusters.
http://www.floridabowthrusters.com

California Linear Devices, Inc.
California Linear Devices high force advanced linear motors, sometimes called linear motors, linear actuators, linear drives, or linear servos, are designed to meet industrial applications like automation, robotics, material testing, packaging, pumping, welding, machine tool, stamping or tufting.
http://www.calinear.com/

Del-Tron Precision, Inc.
manufacturer of linear bearings, linear ball slides, linear crossed roller slides, linear positioners & multiaxis stages. buy online, download CAD drawings.
http://www.deltron.com

Warner Linear
Warner Electric is a provider of industrial clutch and brake products to industry.
http://www.warnerlinear.com/

Software by P.B. Stark and Coauthors
Bvls.f solves least-squares problems with bounds on the variables. Qr.f computes QR decompositions in a stable way. Sbl1.f finds bounds on linear functionals of an n-vector subject to an l1 constraint on the misfit to a set of linear relations, and linear inequality constraints on the variables. Sbvq.f finds bounds on linear functionals of an n-vector subject to a quadratic constraint on the misfit to a set of linear relations, and linear inequality constraints on the variables.
http://128.32.135.2/~stark/Code/

Macron Dynamics, Inc.
Linear actuators from Macron are guaranteed for life. Macron offers standard and custom linear motion products and engineering of custom automation and mechanical motion systems.
http://www.macrondynamics.com

Linear Complexity: A Literature Survey
The linear complexity (LC) of a sequence is the size in bits of the shortest linear feedback shift register (LFSR) which can produce that sequence. The measure speaks to the difficulty of generating, and perhaps analyzing, a particular sequence.
http://www.ciphersbyritter.com/RES/LINCOMPL.HTM