Passive Components, Inc.
Distributor of interconnect, passive, and electromechanical components. Online line card, RFQ and links to manufacturers.
http://www.pcipci.com/

Passive-On Project
Official website of the Passive-On project
http://www.passive-on.org

Passive Typology the Case Link
Analysis of passive formation in Seediq and other Austronesian languages which treats passivisation as primarily a diathetic change that in some languages details a valency reduction.
http://www.ling.lu.se/disseminations/pdf/45/Holmer.pdf

Passive Integrated Transponder Information System
PIT (Passive Integrated Transponder) tags are used to monitor the movement and inferred behavior of juvenile and adult salmon and steelhead trout throughout the Columbia River Basin in the Pacific Northwest region of the United States. The PIT Tag Information System (PTAGIS) provides a centralized source for real-time PIT tag data accrual, storage, and exchange. This information is typically used by public, academic, and private entities involved in the mitigation and enhancement of the salmon resource. PTAGIS is funded by the Bonneville Power Administration (BPA), and administered by the Pacific States Marine Fisheries Commission (PSMFC).
http://www.ptagis.org/

Passive OS Fingerprinting (pOf)
An advanced passive OS/network fingerprinting utility for use in IDS environments, honeypots environments, firewalls and servers.
http://lcamtuf.coredump.cx/p0f.shtml

Workable passive FTP connections through a firewall
So you installed a firewall, but it seems to have crippled passive ftp connections. Your clients are complaining of timeouts and lagging performance of the FTP server. All these are signs that you did not configure your firewall and FTP server properly for passive FTP connections.
http://www.theserverpages.com/20103/13/

European Association for Passive Fire Protection (EAPFP)
A federation of national trade associations involved in the fire protection of structures, steelwork, timber, concrete and other passive fire protection applications including penetration seals and ductwork. Events calendar, member resources, technical articles are featured.
http://www.eapfp.com

TTI Europe
TTI Inc. is the World's leading Passive and Connector Specialist. TTI offers hard to find parts, large in-stock inventories and short lead times
http://www.ttieurope.com/

Kaigon
Specializes in CATV passive equipment.
http://www.kaigon.com/

Cvc International Llc
CVC, incorporated in Delaware, USA, is a widely appraised manufacturer of world-class electronic components with own brand: CVC.
http://www.cvcworld.com