1. 
   Port-map
   In two-stroke engine technology a Port-map is a diagram which shows the ports that are cut in to the cylinder of an engine. A port-map can be useful to determine opening/closing-timing and the area of specific ports. These diagrams are usually represented as a rolled out cylinder where the width eq...
   Found op http://en.wikipedia.org/wiki/Port-map
   
   
2. 
   Portable graymap
   Loretta Young (January 6 1913 – August 12 2000) was an Academy Award-winning American actress. Born in Salt Lake City, Utah as Gretchen Young, she moved with her family to Hollywood when she was three years old. Loretta and her sisters, Polly Ann Young and Elizabeth Jane Young (screen name Sally ...
   Found op http://en.wikipedia.org/wiki/Portable_graymap
   
   
3. 
   Portable Pixmap
   (file format) (PPM) A colour image file format. A PPM file contains the following: a two character 'magic number' - 'P3', the width in pixels, the height in pixels, the maximum colour component value, HEIGHT rows of WIDTH pixels. The rows are ordered from top to bottom with the pixels in each r...
   Found op http://foldoc.org/Portable+Pixmap
   
   
4. 
   Portmap
   The port mapper (rpc.portmap or just portmap, or rpcbind) is an Open Network Computing Remote Procedure Call (ONC RPC) service that runs on network nodes that provide other ONC RPC services. Version 2 of the port mapper protocol maps ONC RPC program number/version number pairs to the network port n...
   Found op http://en.wikipedia.org/wiki/Portmap
   
   

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