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+**Server address**
+
+NTP servers are managed by several organizations. The pool.ntp.org
+project and Network Time Foundation are probably the two most famous.
+The pool.ntp.org project organize servers into pools whereas Network
+Time Foundation maintains a list of valid NTP servers. The servers are
+divided into two categories: Stratum 1 and Stratum 2.
+
+The NTP pool servers are divided into zones. If you want to use a server
+in Europe you can use set the server address to europe.pool.ntp.org.
+For North America the server address is north-america.pool.ntp.org.
+Zones also exists for countries. To use a server in for example Germany
+the server address should be set to de.pool.ntp.org. For Switzerland
+the address should be ch.pool.ntp.org.
+
+Network Time Foundation has a website on http://support.ntp.org/
+The pool.ntp.org project website is located at https://www.ntppool.org/
+
+Pool server addresses will automatically be prefixed with 0, 1, 2 or 3
+in order to lower the risk of choosing a none-responsive server.
+
+**Server port**
+
+NTP servers use port 123 as default. Only under special circumstances
+is the NTP server port different from 123.
+
+**Interval between requests**
+
+The Amiga hardware clock will slowly drift away from true time. The
+drift is determined by several factors and is small, but the drift is not
+insignificant. Request are repeatedly sent to the NTP server in order to
+keep the Amiga hardware clock as close to true time as possible.
+
+The requests are sent in certain intervals defined by the interval
+parameter. The interval should be specified using milliseconds. One
+thousand (1.000) milliseconds are equal to one second.
+
+**Adjustment threshold**
+
+Due to the accuracy of NTP servers and the nature of Amiga CPUs it does
+not make sense to adjust the Amiga clock on every response from the NTP
+server. Processing the response could take longer time than anticipated.
+The amount of accepted inaccuracy is set using the threshold parameter.
+The threshold should be specified using microsecond. One million
+microseconds (1.000.000) are equal to one second.
+
+**Read only**
+
+It is possible to send request to the NTP server without setting the
+Amiga hardware clock. This option can be handy when debugging time zone
+setup and other time related parameters.
+
+**Expert mode**
+
+Advanced settings are hidden from the settings window when expert mode
+is not enabled. The advanced settings are server port, interval between
+requests, adjustment threshold, connection timeout, verbosity level and
+commodity priority.
+
+**Connection timeout**
+
+In some cases, a connection to the NTP server cannot be established or
+the NTP server simply does respond. To avoid an infinitive wait for a
+response the connection will instead make a time out. The timeout
+interval should be specified using milliseconds. One thousand (1.000)
+milliseconds are equal to one second.
+
+**Logging**
+
+It is possible view log messages using the supplied tool TimeLogger.
+
+**Caveats**
+
+TimeKeeper does not start as a background process. When started in the
+startup-sequence it will by default block execution. Use the run command
+to avoid this behaviour:
+    > RUN >NIL: TimeKeeper
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