These are the default Properties that exists in Lotus Notes 5.0.11 (why someone would need them is explained in the future), and can be retrieved with the static System.getProperties() method:
appletviewer.security.domain.notes.mode=unrestricted
appletviewer.security.domain.secure.addresses=
appletviewer.security.domain.secure.mode=domain
appletviewer.security.domains=secure
appletviewer.security.mode=host
appletviewer.security.protocols=http, https, notes
browser.applet=true
browser.vendor.applet=true
browser.vendor=Lotus Development
browser.version.applet=true
browser.version=5.0
browser=Lotus Notes
file.encoding=Cp1252
file.separator.applet=true
firewallSet=false
http.agent=JDK/1.0.2
java.class.version.applet=true
java.protocol.handler.pkgs=COM.ibm.JEmpower.applet
java.vendor.applet=true
java.vendor.url.applet=true
java.version.applet=true
line.separator.applet=true
os.arch.applet=true
os.name.applet=true
os.version.applet=true
package.restrict.access.COM.ibm.JEmpower.applet=true
package.restrict.access.lotus.domino=true
package.restrict.access.lotus.notes=true
package.restrict.access.sun=true
package.restrict.definition.COM.ibm.JEmpower.applet=true
package.restrict.definition.java=true
package.restrict.definition.lotus.domino=true
package.restrict.definition.lotus.notes=true
package.restrict.definition.sun=true
path.separator.applet=true
proxySet=false