diff --git a/server.py b/server.py
index c2fd976..5253342 100644
--- a/server.py
+++ b/server.py
@@ -15,7 +15,7 @@ app.config['SQLALCHEMY_TRACK_MODIFICATIONS'] = False
 db = SQLAlchemy(app)
 
 
-sistemioperativi = [" ", "CentOS", "Fedora", "OpenSUSE", "Red Hat", "Ubuntu", "Debian", "Windows Server 2003",
+sistemioperativi = ["CentOS", "Fedora", "OpenSUSE", "Red Hat", "Ubuntu", "Debian", "Windows Server 2003",
                     "Windows Server 2007", "Windows Server 2010", "Windows Server 2012", "Windows Server 2016",
                     "Windows 98", "Windows ME", "Windows 2000", "Windows XP", "Windows Vista", "Windows 7", "Windows 8",
                     "Windows 8.1", "Windows 10", "Altro"]
diff --git a/templates/dispositivo/show.htm b/templates/dispositivo/show.htm
index 8be9bbe..04c5ddb 100644
--- a/templates/dispositivo/show.htm
+++ b/templates/dispositivo/show.htm
@@ -66,11 +66,12 @@
         <div class="form-group">
             <label class="col-xs-2" for="form-tipo">Tipo dispositivo</label>
             <div class="col-xs-10">
-                <select id="form-tipo" class="form-control" name="tipo">
+                <input type="text" class="form-control" name="tipo" list="form-tipo" {% if dispositivo %}value="{{ dispositivo.tipo }}"{% endif %}>
+                <datalist id="form-tipo" name="tipo">
                     {% for opzione in opzioni %}
-                        <option value="{{ opzione }}" {% if dispositivo and opzione == dispositivo.tipo %}selected{% endif %}>{{ opzione }}</option>
+                        <option value="{{ opzione }}">{{ opzione }}</option>
                     {% endfor %}
-                </select>
+                </datalist>
             </div>
         </div>
         <div class="form-group">
@@ -87,11 +88,12 @@
         <div class="form-group">
             <label class="col-xs-2" for="form-so">Sistema operativo</label>
             <div class="col-xs-10">
-                <select id="form-so" class="form-control" name="so">
+                <input type="text" class="form-control" name="so" list="form-so" {% if dispositivo %}value="{{ dispositivo.so }}"{% endif %}>
+                <datalist id="form-so" name="so">
                     {% for sistema in sistemi %}
-                        <option value="{{ sistema }}" {% if dispositivo and sistema == dispositivo.so %}selected{% endif %}>{{ sistema }}</option>
+                        <option value="{{ sistema }}">{{ sistema }}</option>
                     {% endfor %}
-                </select>
+                </datalist>
             </div>
         </div>
         <div class="form-group">