Portable Document Format. An electronic document that must be read with the Adobe Acrobat computer program.davidd2957 said:What is a PDF ??
Landon,landonjensen said:i know that on 9-11 they had very bad reception in the towers when they were rescuing people so then dispatch / IC could not get info to the men inside the building. Anyone know why this happened that they did not get good reception inside the towers?