diff --git a/client_add_modal.php b/client_add_modal.php
index dcc62e5b..c70976f0 100644
--- a/client_add_modal.php
+++ b/client_add_modal.php
@@ -291,6 +291,16 @@
 
                         <div class="tab-pane fade" id="pills-more">
 
+                            <div class="form-group">
+                                <label>Abbreviation</label>
+                                <div class="input-group">
+                                    <div class="input-group-prepend">
+                                        <span class="input-group-text"><i class="fa fa-fw fa-id-badge"></i></span>
+                                    </div>
+                                    <input type="text" class="form-control" name="abbreviation" placeholder="Abbreviated name for client" maxlength="5">
+                                </div>
+                            </div>
+
                             <div class="form-group">
                                 <label>Notes</label>
                                 <textarea class="form-control" rows="6" name="notes" placeholder="Enter some notes"></textarea>
diff --git a/client_edit_modal.php b/client_edit_modal.php
index 5dbda1f8..548afabf 100644
--- a/client_edit_modal.php
+++ b/client_edit_modal.php
@@ -184,6 +184,16 @@
 
                         <div class="tab-pane fade" id="pills-client-more<?php echo $client_id; ?>">
 
+                            <div class="form-group">
+                                <label>Abbreviation</label>
+                                <div class="input-group">
+                                    <div class="input-group-prepend">
+                                        <span class="input-group-text"><i class="fa fa-fw fa-id-badge"></i></span>
+                                    </div>
+                                    <input type="text" class="form-control" name="abbreviation" placeholder="Abbreviated name for client" value="<?php echo $client_abbreviation; ?>" maxlength="5">
+                                </div>
+                            </div>
+
                             <div class="form-group">
                                 <textarea class="form-control" rows="8" placeholder="Enter some notes"
                                     name="notes"><?php echo $client_notes; ?></textarea>
diff --git a/client_side_nav.php b/client_side_nav.php
index 5595b8ea..29528879 100644
--- a/client_side_nav.php
+++ b/client_side_nav.php
@@ -2,7 +2,7 @@
 <aside class="main-sidebar sidebar-dark-<?php echo nullable_htmlentities($config_theme); ?> d-print-none">
 
     <a class="brand-link pb-1 mt-1" href="clients.php">
-        <p class="h5"><i class="nav-icon fas fa-arrow-left ml-3 mr-2"></i> Back | <strong><?php echo shortenClient($client_name); ?></strong></p>
+        <p class="h5"><i class="nav-icon fas fa-arrow-left ml-3 mr-2"></i> Back | <strong><?php if($client_abbreviation) { echo $client_abbreviation; } else { echo shortenClient($client_name); } ?></strong></p>
     </a>
 
     <!-- Sidebar -->
diff --git a/clients.php b/clients.php
index 850838a4..4ead3d68 100644
--- a/clients.php
+++ b/clients.php
@@ -286,6 +286,7 @@ $num_rows = mysqli_fetch_row(mysqli_query($mysqli, "SELECT FOUND_ROWS()"));
                         $client_net_terms = intval($row['client_net_terms']);
                         $client_tax_id_number = nullable_htmlentities($row['client_tax_id_number']);
                         $client_referral = nullable_htmlentities($row['client_referral']);
+                        $client_abbreviation = nullable_htmlentities($row['client_abbreviation']);
                         $client_notes = nullable_htmlentities($row['client_notes']);
                         $client_created_at = date('Y-m-d', strtotime($row['client_created_at']));
                         $client_updated_at = nullable_htmlentities($row['client_updated_at']);
diff --git a/database_updates.php b/database_updates.php
index 1a154692..17512337 100644
--- a/database_updates.php
+++ b/database_updates.php
@@ -1942,12 +1942,21 @@ if (LATEST_DATABASE_VERSION > CURRENT_DATABASE_VERSION) {
         mysqli_query($mysqli, "UPDATE `settings` SET `config_current_database_version` = '1.3.6'");
     }
 
-    // if (CURRENT_DATABASE_VERSION == '1.3.6') {
-    //     // Insert queries here required to update to DB version 1.3.7
+    if (CURRENT_DATABASE_VERSION == '1.3.6') {
+        mysqli_query($mysqli, "ALTER TABLE `clients` ADD `client_abbreviation` VARCHAR(10) DEFAULT NULL AFTER `client_tax_id_number`");
+    
+        mysqli_query($mysqli, "UPDATE `settings` SET `config_current_database_version` = '1.3.7'");
+     }
+
+    // if (CURRENT_DATABASE_VERSION == '1.3.7') {
+    //     // Insert queries here required to update to DB version 1.3.8
     //     // Then, update the database to the next sequential version
-    //     mysqli_query($mysqli, "UPDATE `settings` SET `config_current_database_version` = '1.3.7'");
+    //     mysqli_query($mysqli, "UPDATE `settings` SET `config_current_database_version` = '1.3.8'");
     // }
 
+
+    
+
 } else {
     // Up-to-date
 }
diff --git a/database_version.php b/database_version.php
index f094eeb8..bb9fbf82 100644
--- a/database_version.php
+++ b/database_version.php
@@ -5,4 +5,4 @@
  * It is used in conjunction with database_updates.php
  */
 
-DEFINE("LATEST_DATABASE_VERSION", "1.3.6");
+DEFINE("LATEST_DATABASE_VERSION", "1.3.7");
diff --git a/db.sql b/db.sql
index 98cc8242..07aa704c 100644
--- a/db.sql
+++ b/db.sql
@@ -274,6 +274,7 @@ CREATE TABLE `clients` (
   `client_currency_code` varchar(200) NOT NULL,
   `client_net_terms` int(10) NOT NULL,
   `client_tax_id_number` varchar(255) DEFAULT NULL,
+  `client_abbreviation` varchar(10) DEFAULT NULL,
   `client_notes` text DEFAULT NULL,
   `client_created_at` datetime NOT NULL DEFAULT current_timestamp(),
   `client_updated_at` datetime DEFAULT NULL ON UPDATE current_timestamp(),
@@ -1966,4 +1967,4 @@ CREATE TABLE `vendors` (
 /*!40101 SET COLLATION_CONNECTION=@OLD_COLLATION_CONNECTION */;
 /*!40111 SET SQL_NOTES=@OLD_SQL_NOTES */;
 
--- Dump completed on 2024-06-01 14:25:19
+-- Dump completed on 2024-06-07 18:18:21
diff --git a/inc_all_client.php b/inc_all_client.php
index bf43cc58..0b44e800 100644
--- a/inc_all_client.php
+++ b/inc_all_client.php
@@ -51,6 +51,7 @@ if (isset($_GET['client_id'])) {
             $client_net_terms = $config_default_net_terms;
         }
         $client_tax_id_number = nullable_htmlentities($row['client_tax_id_number']);
+        $client_abbreviation = nullable_htmlentities($row['client_abbreviation']);
         $client_rate = floatval($row['client_rate']);
         $client_notes = nullable_htmlentities($row['client_notes']);
         $client_created_at = nullable_htmlentities($row['client_created_at']);
diff --git a/post/client.php b/post/client.php
index 151c772a..c9f2bf07 100644
--- a/post/client.php
+++ b/post/client.php
@@ -27,7 +27,7 @@ if (isset($_POST['add_client'])) {
     $extended_log_description = '';
 
     // Create client
-    mysqli_query($mysqli, "INSERT INTO clients SET client_name = '$name', client_type = '$type', client_website = '$website', client_referral = '$referral', client_rate = $rate, client_currency_code = '$currency_code', client_net_terms = $net_terms, client_tax_id_number = '$tax_id_number', client_lead = $lead, client_notes = '$notes', client_accessed_at = NOW()");
+    mysqli_query($mysqli, "INSERT INTO clients SET client_name = '$name', client_type = '$type', client_website = '$website', client_referral = '$referral', client_rate = $rate, client_currency_code = '$currency_code', client_net_terms = $net_terms, client_tax_id_number = '$tax_id_number', client_lead = $lead, client_abbreviation = '$abbreviation', client_notes = '$notes', client_accessed_at = NOW()");
 
     $client_id = mysqli_insert_id($mysqli);
 
@@ -123,7 +123,7 @@ if (isset($_POST['edit_client'])) {
 
     $client_id = intval($_POST['client_id']);
 
-    mysqli_query($mysqli, "UPDATE clients SET client_name = '$name', client_type = '$type', client_website = '$website', client_referral = '$referral', client_rate = $rate, client_currency_code = '$currency_code', client_net_terms = $net_terms, client_tax_id_number = '$tax_id_number', client_lead = $lead, client_notes = '$notes' WHERE client_id = $client_id");
+    mysqli_query($mysqli, "UPDATE clients SET client_name = '$name', client_type = '$type', client_website = '$website', client_referral = '$referral', client_rate = $rate, client_currency_code = '$currency_code', client_net_terms = $net_terms, client_tax_id_number = '$tax_id_number', client_lead = $lead, client_abbreviation = '$abbreviation', client_notes = '$notes' WHERE client_id = $client_id");
 
     // Create Referral if it doesn't exist
     $sql = mysqli_query($mysqli, "SELECT category_name FROM categories WHERE category_type = 'Referral' AND category_archived_at IS NULL AND category_name = '$referral'");
diff --git a/post/client_model.php b/post/client_model.php
index 05179131..f02fb066 100644
--- a/post/client_model.php
+++ b/post/client_model.php
@@ -7,5 +7,6 @@ $rate = floatval($_POST['rate']);
 $currency_code = sanitizeInput($_POST['currency_code']);
 $net_terms = intval($_POST['net_terms']);
 $tax_id_number = sanitizeInput($_POST['tax_id_number']);
+$abbreviation = sanitizeInput($_POST['abbreviation']);
 $notes = sanitizeInput($_POST['notes']);
 $lead = intval($_POST['lead']);