diff --git a/builtins/src/main/java/org/jline/builtins/ConsoleEngineImpl.java b/builtins/src/main/java/org/jline/builtins/ConsoleEngineImpl.java
index 25e433a93..52b88dd6d 100644
--- a/builtins/src/main/java/org/jline/builtins/ConsoleEngineImpl.java
+++ b/builtins/src/main/java/org/jline/builtins/ConsoleEngineImpl.java
@@ -440,7 +440,17 @@ public Object engines(Builtins.CommandInput input) {
     }
 
     public Object show(Builtins.CommandInput input) {
-        return engine.get();
+        final String[] usage = {
+                "show -  list console variables",
+                "Usage: show [VARIABLE]",
+                "  -? --help                       Displays command help",
+        };
+        Options opt = Options.compile(usage).parse(input.args());
+        if (opt.isSet("help")) {
+            exception = new HelpException(opt.usage());
+            return null;
+        }
+        return engine.find(input.args().length > 0 ? input.args()[0] : null);
     }
 
     public Object del(Builtins.CommandInput input) {
diff --git a/groovy/src/main/java/org/jline/script/GroovyEngine.java b/groovy/src/main/java/org/jline/script/GroovyEngine.java
index 63520c37d..5bda09862 100644
--- a/groovy/src/main/java/org/jline/script/GroovyEngine.java
+++ b/groovy/src/main/java/org/jline/script/GroovyEngine.java
@@ -27,6 +27,7 @@
  * @author <a href="mailto:matti.rintanikkola@gmail.com">Matti Rinta-Nikkola</a>
  */
 public class GroovyEngine implements ScriptEngine {
+    private static final String REGEX_SYSTEM_VAR = "[A-Z]{1}[A-Z_]*";
     private GroovyShell shell;
     private Binding sharedData;
     private Map<String,String> imports = new HashMap<String,String>();
@@ -53,8 +54,16 @@ public Object get(String name) {
 
     @SuppressWarnings("unchecked")
     @Override
-    public Map<String,Object> get() {
-        return sharedData.getVariables();
+    public Map<String,Object> find(String name) {
+        Map<String, Object> out = new HashMap<>();
+        if (name == null) {
+            out = sharedData.getVariables();
+        } else {
+            for (String v : internalFind(name)) {
+                out.put(v, get(v));
+            }
+        }
+        return out;
     }
 
     @Override
@@ -110,6 +119,19 @@ public List<String> getExtensions() {
     }
 
     @SuppressWarnings("unchecked")
+    private List<String> internalFind(String var) {
+        List<String> out = new ArrayList<>();
+        if(!var.contains(".") && var.contains("*")) {
+            var = var.replaceAll("\\*", ".*");
+        }
+        for (String v :  (Set<String>)sharedData.getVariables().keySet()) {
+            if (v.matches(var)) {
+                out.add(v);
+            }
+        }
+        return out;
+    }
+
     private void del(String var) {
         if (var == null) {
             return;
@@ -119,16 +141,8 @@ private void del(String var) {
         } else if (sharedData.hasVariable(var)) {
             sharedData.getVariables().remove(var);
         } else if (!var.contains(".") && var.contains("*")) {
-            var = var.replaceAll("\\*", ".*");
-            Map<String, Object> vars=sharedData.getVariables();
-            List<String> todel = new ArrayList<String>();
-            for (Map.Entry<String,Object> entry : vars.entrySet()){
-                if (!entry.getKey().equals("_") && entry.getKey().matches(var)) {
-                    todel.add(entry.getKey());
-                }
-            }
-            for (String v : todel){
-                if (sharedData.hasVariable(v)) {
+            for (String v : internalFind(var)){
+                if (sharedData.hasVariable(v) && !v.equals("_") && !v.matches(REGEX_SYSTEM_VAR)) {
                     sharedData.getVariables().remove(v);
                 }
             }
@@ -165,29 +179,29 @@ public List<AttributedString> highlight(Map<String, Object> options, Object obj)
             throw new IllegalArgumentException("Bad style option: " + style);
         } else {
             try {
-                out = formatInternal(options, obj);
+                out = internalHighlight(options, obj);
             } catch (Exception e) {
-                out = formatInternal(options, Utils.convert(obj));
+                out = internalHighlight(options, Utils.convert(obj));
             }
         }
         return out;
     }
 
     @SuppressWarnings("unchecked")
-    private List<AttributedString> formatInternal(Map<String, Object> options, Object obj) {
+    private List<AttributedString> internalHighlight(Map<String, Object> options, Object obj) {
         List<AttributedString> out = new ArrayList<>();
         int width = (int)options.getOrDefault("width", Integer.MAX_VALUE);
         if (obj == null) {
             // do nothing
         } else if (obj instanceof Map) {
-            out = formatMap((Map<String, Object>)obj, width);
+            out = highlightMap((Map<String, Object>)obj, width);
         } else if (obj instanceof Collection<?>) {
             Collection<?> collection = (Collection<?>)obj;
             if (!collection.isEmpty()) {
                 if (collection.size() == 1) {
                     Object elem = collection.iterator().next();
                     if (elem instanceof Map) {
-                        out = formatMap((Map<String, Object>)elem, width);
+                        out = highlightMap((Map<String, Object>)elem, width);
                     } else {
                         out.add(new AttributedString(Utils.toString(obj)));
                     }
@@ -284,7 +298,7 @@ private void toTabStops(List<Integer> columns) {
         }
     }
 
-    private List<AttributedString> formatMap(Map<String, Object> map, int width) {
+    private List<AttributedString> highlightMap(Map<String, Object> map, int width) {
         List<AttributedString> out = new ArrayList<>();
         int max = map.keySet().stream().map(String::length).max(Integer::compareTo).get();
         for (Map.Entry<String, Object> entry : map.entrySet()) {
diff --git a/reader/src/main/java/org/jline/reader/ScriptEngine.java b/reader/src/main/java/org/jline/reader/ScriptEngine.java
index 65ba17a9b..0d4a24711 100644
--- a/reader/src/main/java/org/jline/reader/ScriptEngine.java
+++ b/reader/src/main/java/org/jline/reader/ScriptEngine.java
@@ -16,6 +16,11 @@
 
 import org.jline.utils.AttributedString;
 
+/**
+ * Manage scriptEngine variables, statements and script execution.
+ *
+ * @author <a href="mailto:matti.rintanikkola@gmail.com">Matti Rinta-Nikkola</a>
+ */
 public interface ScriptEngine {
 
     String getEngineName();
@@ -28,7 +33,11 @@ public interface ScriptEngine {
 
     Object get(String name);
 
-    Map<String,Object> get();
+    default Map<String,Object> find() {
+        return find(null);
+    }
+
+    Map<String,Object> find(String name);
 
     void del(String... vars);