diff --git a/server/include/hist.h b/server/include/hist.h
index 623f18290..1c71faaa1 100644
--- a/server/include/hist.h
+++ b/server/include/hist.h
@@ -10,47 +10,65 @@
 #define HIST_HEIGHT	50
 #define HIST_SEQ	17
 
-/** Histogram structure */
 typedef unsigned hist_cnt_t;
 
+/** Histogram structure used to collect statistics. */
 struct hist {
+	/** The distance between two adjacent buckets. */
 	double resolution;
 	
+	/** The value of the highest bucket. */
 	double high;
+	/** The value of the lowest bucket. */
 	double low;
 	
+	/** The highest value observed (may be higher than #high). */
 	double highest;
+	/** The lowest value observed (may be lower than #low). */
 	double lowest;
 	
+	/** The number of buckets in #data. */
 	int length;
 
+	/** Total number of counted values between #low and #high. */
 	hist_cnt_t total;
+	/** The number of values which are higher than #high. */ 
 	hist_cnt_t higher;
+	/** The number of values which are lower than #low. */
 	hist_cnt_t lower;
 
+	/** Pointer to dynamically allocated array of bucket counters. */
 	hist_cnt_t *data;
 };
 
+/** Initialize struct hist with supplied values and allocate memory for buckets. */
 void hist_init(struct hist *h, double start, double end, double resolution);
 
+/** Free the dynamically allocated memory. */
 void hist_free(struct hist *h);
 
+/** Reset all counters and values back to zero. */
 void hist_reset(struct hist *h);
 
+/** Count a value within its corresponding bucket. */
 void hist_put(struct hist *h, double value);
 
+/** Calcluate the variance of all counted values. */
 double hist_var(struct hist *h);
 
+/** Calculate the mean average of all counted values. */
 double hist_mean(struct hist *h);
 
+/** Calculate the standard derivation of all counted values. */
 double hist_stddev(struct hist *h);
 
+/** Print all statistical properties of distribution including a graphilcal plot of the histogram. */
 void hist_print(struct hist *h);
 
 /** Print ASCII style plot of histogram */
 void hist_plot(struct hist *h);
 
-/** Dump histogram data in Matlab format */
+/** Dump histogram data in Matlab format to stdout */
 void hist_dump(struct hist *h);
 
 #endif /* _HIST_H_ */
\ No newline at end of file