diff --git a/crc.go b/crc.go
index b325db5..93793a6 100644
--- a/crc.go
+++ b/crc.go
@@ -1,13 +1,19 @@
+// CRC16 implements the CRC-16-CCITT algorithm.
+// The polynomial is 0x1021.
+// It accepts a byte slice and returns a 16-bit checksum.
 package crc16
 
 var Crc16Table = make([]uint16, 256)
 
+// GeneratorPolynomial is the polynomial used in the CRC-16-CCITT algorithm.
 const GeneratorPolynomial = 0x1021
 
 func init() {
 	calculateTable()
 }
 
+// calculateTable computes the CRC-16 lookup table.
+// The table is used to speed up the CRC calculation.
 func calculateTable() {
 	for dividend := 0; dividend < 256; dividend++ {
 		crc := uint16(dividend << 8)
@@ -22,6 +28,8 @@ func calculateTable() {
 	}
 }
 
+// Calculates generates a CRC-16 checksum for the given data.
+// It accepts a byte slice and returns a 16-bit checksum.
 func Calculate(data []byte) uint16 {
 	crc := uint16(0)
 	for _, b := range data {