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 # NQPTP – Not Quite PTP
-The `nqptp` daemon monitors PTP traffic. Briefly, `nqptp` monitors the times of any [PTP](https://en.wikipedia.org/wiki/Precision_Time_Protocol) clocks – up to 32 – it sees on ports 319 and 320. It maintains records for each clock, identified by its Clock ID and IP. Information about the *master clock* is provided in a [POSIX shared memory](https://pubs.opengroup.org/onlinepubs/007908799/xsh/shm_open.html) interface at `/nqptp`. 
+`nqptp` monitors PTP traffic. Briefly, `nqptp` monitors timing data from any [PTP](https://en.wikipedia.org/wiki/Precision_Time_Protocol) clocks – up to 32 – it sees on ports 319 and 320. It maintains records for each clock, identified by its Clock ID and IP.
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+Information about the *master clock* is provided in a [POSIX shared memory](https://pubs.opengroup.org/onlinepubs/007908799/xsh/shm_open.html) interface at `/nqptp`. 
 
 A timing peer list can be sent to `nqptp` over port 9000. The list consists of the letter 'T' followed by a space-separated list of the IP numbers of the timing peers. The list *completely replaces* any existing timing peer list.
 
@@ -30,7 +32,7 @@ $ make
 The `make install` installs a `systemd` startup script. You should enable it and start it in the normal way. Note that `nqptp` must run in `root` mode to be able to access ports 319 and 320.
 
 # Notes
-If you wish to use the shared mutex to ensure records are not altered while you are accessing them, you should open your side of the shared memory interface with read-write permission. Be aware that while your program has the mutex lock, it is in a "critical region" wherer it can halt `nqptp`, so keep any activity while you have the lock very short and very simple, e.g. copying it to local memory. 
+If you wish to use the shared mutex to ensure records are not altered while you are accessing them, you should open your side of the shared memory interface with read-write permission. Be aware that while your program has the mutex lock, it is in a "critical region" where it can halt `nqptp`, so keep any activity while you have the lock very short and very simple, e.g. copying it to local memory. 
 
 Clock records not updated for a period are deleted.