diff --git a/symbols.go b/symbols.go
index 9158e4f..b9e3d20 100644
--- a/symbols.go
+++ b/symbols.go
@@ -1,5 +1,9 @@
 package hexadeca
 
+import (
+	"sourcecode.social/reiver/go-hexadeca/symbols/byte"
+)
+
 // SymbolLowerCase is used with hexadeca.EncodeByte() to encode a byte into hexadecimal symbols using lower-case symbols from ASCII / Unicode UTF-8.
 // I.e.,
 //
@@ -11,20 +15,9 @@ package hexadeca
 //
 // If ‘value’ was 254 (== 0xFE) then ‘mostSignificiant’ would be 'f' and and ‘leastSignificant’ would be 'e'.
 func SymbolLowerCase(value byte) rune {
-	return rune(symbolLowerCase(value))
+	return rune(bytesymbols.LowerCase(value))
 }
 
-func symbolLowerCase(value byte) byte {
-	const table string = "0123456789abcdef"
-
-	var index int = int(value) % len(table)
-
-	var result byte = table[index]
-
-	return result
-}
-
-
 // SymbolPersian is used with hexadeca.EncodeByte() to encode a byte into hexadecimal symbols using Persian symbols from Unicode UTF-8.
 // I.e.,
 //
@@ -73,15 +66,5 @@ func SymbolPersian(value byte) rune {
 //
 // If ‘value’ was 254 (== 0xFE) then ‘mostSignificiant’ would be 'F' and and ‘leastSignificant’ would be 'E'.
 func SymbolUpperCase(value byte) rune {
-	return rune(symbolUpperCase(value))
-}
-
-func symbolUpperCase(value byte) byte {
-	const table string = "0123456789ABCDEF"
-
-	var index int = int(value) % len(table)
-
-	var result byte = table[index]
-
-	return result
+	return rune(bytesymbols.UpperCase(value))
 }
diff --git a/symbols/byte/lowercase.go b/symbols/byte/lowercase.go
new file mode 100644
index 0000000..5c59af2
--- /dev/null
+++ b/symbols/byte/lowercase.go
@@ -0,0 +1,21 @@
+package bytesymbols
+
+// LowerCase is used with hexadeca.EncodeByte() to encode a byte into hexadecimal symbols using lower-case symbols from ASCII / Unicode UTF-8.
+// I.e.,
+//
+// '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'a', 'b', 'c', 'd', 'e', 'f'
+//
+// Example usage:
+//
+//	mostSignificiant, leastSignificant := hexadeca.EncodeByte(value, bytesymbols.LowerCase)
+//
+// If ‘value’ was 254 (== 0xFE) then ‘mostSignificiant’ would be 'f' and and ‘leastSignificant’ would be 'e'.
+func LowerCase(value byte) byte {
+	const table string = "0123456789abcdef"
+
+	var index int = int(value) % len(table)
+
+	var result byte = table[index]
+
+	return result
+}
diff --git a/symbols/byte/lowercase_test.go b/symbols/byte/lowercase_test.go
new file mode 100644
index 0000000..6644ffe
--- /dev/null
+++ b/symbols/byte/lowercase_test.go
@@ -0,0 +1,95 @@
+package bytesymbols_test
+
+import (
+	"testing"
+
+	"sourcecode.social/reiver/go-hexadeca/symbols/byte"
+)
+
+func TestSymbolLowerCase(t *testing.T) {
+
+	tests := []struct{
+		Value byte
+		Expected byte
+	}{
+		{
+			Value:     0,
+			Expected: '0',
+		},
+		{
+			Value:     1,
+			Expected: '1',
+		},
+		{
+			Value:     2,
+			Expected: '2',
+		},
+		{
+			Value:     3,
+			Expected: '3',
+		},
+		{
+			Value:     4,
+			Expected: '4',
+		},
+		{
+			Value:     5,
+			Expected: '5',
+		},
+		{
+			Value:     6,
+			Expected: '6',
+		},
+		{
+			Value:     7,
+			Expected: '7',
+		},
+		{
+			Value:     8,
+			Expected: '8',
+		},
+		{
+			Value:     9,
+			Expected: '9',
+		},
+		{
+			Value:    10,
+			Expected: 'a',
+		},
+		{
+			Value:    11,
+			Expected: 'b',
+		},
+		{
+			Value:    12,
+			Expected: 'c',
+		},
+		{
+			Value:    13,
+			Expected: 'd',
+		},
+		{
+			Value:    14,
+			Expected: 'e',
+		},
+		{
+			Value:    15,
+			Expected: 'f',
+		},
+	}
+
+	for testNumber, test := range tests {
+
+		actual := bytesymbols.LowerCase(test.Value)
+		expected := test.Expected
+
+		if expected != actual {
+			t.Errorf("For test #%d, the actual value is not what was expected.", testNumber)
+			t.Logf("EXPECTED: %q (%d)", expected, expected)
+			t.Logf("ACTUAL:   %q (%d)", actual, actual)
+			t.Logf("VALUE:     %x (%d)", test.Value, test.Value)
+			continue
+		}
+
+	}
+}
diff --git a/symbols/byte/uppercase.go b/symbols/byte/uppercase.go
new file mode 100644
index 0000000..ae143ae
--- /dev/null
+++ b/symbols/byte/uppercase.go
@@ -0,0 +1,21 @@
+package bytesymbols
+
+// UpperCase is used with hexadeca.EncodeByte() to encode a byte into hexadecimal symbols using upper-case symbols from ASCII / Unicode UTF-8.
+// I.e.,
+//
+// '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B', 'C', 'D', 'E', 'F'
+//
+// Example usage:
+//
+//	mostSignificiant, leastSignificant := hexadeca.EncodeByte(value, bytesymbols.UpperCase)
+//
+// If ‘value’ was 254 (== 0xFE) then ‘mostSignificiant’ would be 'f' and and ‘leastSignificant’ would be 'e'.
+func UpperCase(value byte) byte {
+	const table string = "0123456789ABCDEF"
+
+	var index int = int(value) % len(table)
+
+	var result byte = table[index]
+
+	return result
+}
diff --git a/symbols/byte/uppercase_test.go b/symbols/byte/uppercase_test.go
new file mode 100644
index 0000000..8de0bd6
--- /dev/null
+++ b/symbols/byte/uppercase_test.go
@@ -0,0 +1,95 @@
+package bytesymbols_test
+
+import (
+	"testing"
+
+	"sourcecode.social/reiver/go-hexadeca/symbols/byte"
+)
+
+func TestSymbolUpperCase(t *testing.T) {
+
+	tests := []struct{
+		Value byte
+		Expected byte
+	}{
+		{
+			Value:     0,
+			Expected: '0',
+		},
+		{
+			Value:     1,
+			Expected: '1',
+		},
+		{
+			Value:     2,
+			Expected: '2',
+		},
+		{
+			Value:     3,
+			Expected: '3',
+		},
+		{
+			Value:     4,
+			Expected: '4',
+		},
+		{
+			Value:     5,
+			Expected: '5',
+		},
+		{
+			Value:     6,
+			Expected: '6',
+		},
+		{
+			Value:     7,
+			Expected: '7',
+		},
+		{
+			Value:     8,
+			Expected: '8',
+		},
+		{
+			Value:     9,
+			Expected: '9',
+		},
+		{
+			Value:    10,
+			Expected: 'A',
+		},
+		{
+			Value:    11,
+			Expected: 'B',
+		},
+		{
+			Value:    12,
+			Expected: 'C',
+		},
+		{
+			Value:    13,
+			Expected: 'D',
+		},
+		{
+			Value:    14,
+			Expected: 'E',
+		},
+		{
+			Value:    15,
+			Expected: 'F',
+		},
+	}
+
+	for testNumber, test := range tests {
+
+		actual := bytesymbols.UpperCase(test.Value)
+		expected := test.Expected
+
+		if expected != actual {
+			t.Errorf("For test #%d, the actual value is not what was expected.", testNumber)
+			t.Logf("EXPECTED: %q (%d)", expected, expected)
+			t.Logf("ACTUAL:   %q (%d)", actual, actual)
+			t.Logf("VALUE:     %x (%d)", test.Value, test.Value)
+			continue
+		}
+
+	}
+}