diff --git a/openslides/assignment/views.py b/openslides/assignment/views.py
index a65d10997..0c1e1f969 100644
--- a/openslides/assignment/views.py
+++ b/openslides/assignment/views.py
@@ -433,8 +433,8 @@ class AssignmentPDF(PDFView):
             candidate_string = candidate.clean_name
             if candidate in elected_candidates:
                 candidate_string = "* " + candidate_string
-            if candidate.category:
-                candidate_string += "\n(%s)" % candidate.category
+            if candidate.name_suffix:
+                candidate_string += "\n(%s)" % candidate.name_suffix
             row.append(candidate_string)
             for vote in poll_list:
                 if vote == None:
@@ -594,7 +594,7 @@ class AssignmentPollPDF(PDFView):
                 cell.append(Paragraph(circle + candidate.clean_name,
                     stylesheet['Ballot_option_name']))
                 if candidate.name_suffix:
-                    cell.append(Paragraph("(%s)" % candidate.category,
+                    cell.append(Paragraph("(%s)" % candidate.name_suffix,
                         stylesheet['Ballot_option_group_right']))
                 else:
                     cell.append(Paragraph(" ",
diff --git a/openslides/participant/forms.py b/openslides/participant/forms.py
index 4687432fe..153285d8f 100644
--- a/openslides/participant/forms.py
+++ b/openslides/participant/forms.py
@@ -27,7 +27,7 @@ class UserCreateForm(forms.ModelForm, CssClassMixin):
 
     class Meta:
         model = User
-        fields = ('first_name', 'last_name', 'is_active', 'groups', 'category',
+        fields = ('first_name', 'last_name', 'is_active', 'groups', 'detail',
                   'gender', 'type', 'committee', 'comment', 'default_password')
 
 
@@ -35,7 +35,7 @@ class UserUpdateForm(UserCreateForm):
     class Meta:
         model = User
         fields = ('username', 'first_name', 'last_name', 'is_active', 'groups',
-                  'category', 'gender', 'type', 'committee', 'comment',
+                  'detail', 'gender', 'type', 'committee', 'comment',
                   'default_password')
 
 
diff --git a/openslides/participant/models.py b/openslides/participant/models.py
index 2cce07709..cabb54b7a 100644
--- a/openslides/participant/models.py
+++ b/openslides/participant/models.py
@@ -37,8 +37,8 @@ class User(DjangoUser, PersonMixin, Person):
     )
 
     django_user = models.OneToOneField(DjangoUser, editable=False, parent_link=True)
-    category = models.CharField(
-        max_length=100, null=True, blank=True, verbose_name=_("Category"),
+    detail = models.CharField(
+        max_length=100, blank=True, default='', verbose_name=_("Detail"),
         help_text=_('Will be shown behind the name.'))
     gender = models.CharField(
         max_length=50, choices=GENDER_CHOICES, blank=True,
@@ -47,13 +47,13 @@ class User(DjangoUser, PersonMixin, Person):
         max_length=100, choices=TYPE_CHOICES, blank=True,
         verbose_name=_("Typ"), help_text=_('Only for filter the userlist.'))
     committee = models.CharField(
-        max_length=100, null=True, blank=True, verbose_name=_("Committee"),
+        max_length=100, blank=True, default='', verbose_name=_("Committee"),
         help_text=_('Only for filter the userlist.'))
     comment = models.TextField(
-        null=True, blank=True, verbose_name=_('Comment'),
+        blank=True, default='', verbose_name=_('Comment'),
         help_text=_('Only for notes.'))
     default_password = models.CharField(
-        max_length=100, null=True, blank=True,
+        max_length=100, blank=True, default='',
         verbose_name=_("Default password"))
 
     @property
@@ -61,10 +61,10 @@ class User(DjangoUser, PersonMixin, Person):
         return self.get_full_name() or self.username
 
     def get_name_suffix(self):
-        return self.category
+        return self.detail
 
     def set_name_suffix(self, value):
-        self.category = value
+        self.detail = value
 
     name_suffix = property(get_name_suffix, set_name_suffix)
 
diff --git a/openslides/participant/templates/participant/overview.html b/openslides/participant/templates/participant/overview.html
index 452bdcb53..f950bc302 100644
--- a/openslides/participant/templates/participant/overview.html
+++ b/openslides/participant/templates/participant/overview.html
@@ -26,11 +26,11 @@
                 <option value="female"{% if 'female' in sortfilter.gender %} selected{% endif %}>{% trans "Female" %}</option>
                 <option value=""{% if '' in sortfilter.gender %} selected{% endif %}>{% trans "Not specified" %}</option>
             </select>
-            <select class="default-input" name="category" onchange="document.forms['filter'].submit()">
-                <option value="---">-- {% trans "Category" %} --</option>
-                {% for category in categories %}
-                    <option value="{{ category }}"{% if category in sortfilter.category %} selected{% endif %}>
-                    {{ category }}</option>
+            <select class="default-input" name="detail" onchange="document.forms['filter'].submit()">
+                <option value="---">-- {% trans "Detail" %} --</option>
+                {% for detail in details %}
+                    <option value="{{ detail }}"{% if detail in sortfilter.detail %} selected{% endif %}>
+                    {{ detail }}</option>
                 {% endfor %}
             </select>
             <select class="default-input" name="type" onchange="document.forms['filter'].submit()">
@@ -65,7 +65,7 @@
         <tr>
             <th><a href="?sort=first_name&reverse={% if 'first_name' in sortfilter.sort and 'reverse' not in sortfilter %}1{% else %}---{%endif%}">{% trans "First Name" %}</a></th>
             <th><a href="?sort=last_name&reverse={% if 'last_name' in sortfilter.sort and 'reverse' not in sortfilter %}1{% else %}---{%endif%}">{% trans "Last Name" %}</a></th>
-            <th><a href="?sort=category&reverse={% if 'category' in sortfilter.sort and 'reverse' not in sortfilter %}1{% else %}---{%endif%}">{% trans "Category" %}</a></th>
+            <th><a href="?sort=detail&reverse={% if 'detail' in sortfilter.sort and 'reverse' not in sortfilter %}1{% else %}---{%endif%}">{% trans "Detail" %}</a></th>
             <th><a href="?sort=type&reverse={% if 'type' in sortfilter.sort and 'reverse' not in sortfilter %}1{% else %}---{%endif%}">{% trans "Type" %}</a></th>
             <th><a href="?sort=committee&reverse={% if 'committee' in sortfilter.sort and 'reverse' not in sortfilter %}1{% else %}---{%endif%}">{% trans "Committee" %}</a></th>
             {% if perms.participant.can_manage_participant %}
@@ -78,7 +78,7 @@
             <tr class="{% cycle '' 'odd' %}">
                 <td>{{ user.first_name }}</td>
                 <td>{{ user.last_name }}</td>
-                <td>{{ user.category }}</td>
+                <td>{{ user.detail }}</td>
                 <td>{{ user.get_type_display }}</td>
                 <td>{{ user.committee }}</td>
                 {% if perms.participant.can_manage_participant %}
diff --git a/openslides/participant/tests.py b/openslides/participant/tests.py
index 8418e994d..43db62492 100644
--- a/openslides/participant/tests.py
+++ b/openslides/participant/tests.py
@@ -35,12 +35,12 @@ class UserTest(TestCase):
         self.assertEqual(self.django_user1, self.user1.django_user)
 
     def test_repr(self):
-        self.assertEqual(unicode(self.user1), u'Max Mustermann')
+        self.assertEqual(unicode(self.user1), 'Max Mustermann')
 
     def test_name_surfix(self):
-        self.user1.category = u'München'
+        self.user1.detail = 'München'
         self.user1.save()
-        self.assertEqual(unicode(self.user1), u'Max Mustermann (München)')
+        self.assertEqual(unicode(self.user1), 'Max Mustermann (München)')
 
     def test_reset_password(self):
         self.assertIsInstance(self.user1.default_password, basestring)
diff --git a/openslides/participant/views.py b/openslides/participant/views.py
index 63d70f77b..8c49d6eee 100644
--- a/openslides/participant/views.py
+++ b/openslides/participant/views.py
@@ -66,8 +66,8 @@ class Overview(ListView):
         except KeyError:
             sortfilter = {}
 
-        for value in [u'gender', u'category', u'type', u'committee', u'status',
-                      u'sort', u'reverse']:
+        for value in ['gender', 'detail', 'type', 'committee', 'status',
+                      'sort', 'reverse']:
             if value in self.request.REQUEST:
                 if self.request.REQUEST[value] == '---':
                     try:
@@ -80,8 +80,8 @@ class Overview(ListView):
         query = User.objects
         if 'gender' in sortfilter:
             query = query.filter(gender__iexact=sortfilter['gender'][0])
-        if 'category' in sortfilter:
-            query = query.filter(category__iexact=sortfilter['category'][0])
+        if 'detail' in sortfilter:
+            query = query.filter(detail__iexact=sortfilter['detail'][0])
         if 'type' in sortfilter:
             query = query.filter(type__iexact=sortfilter['type'][0])
         if 'committee' in sortfilter:
@@ -92,7 +92,7 @@ class Overview(ListView):
             if sortfilter['sort'][0] in ['first_name', 'last_name', 'last_login']:
                 query = query.order_by(sortfilter['sort'][0])
             elif (sortfilter['sort'][0] in
-                    ['category', 'type', 'committee', 'comment']):
+                    ['detail', 'type', 'committee', 'comment']):
                 query = query.order_by(
                     '%s' % sortfilter['sort'][0])
         else:
@@ -118,8 +118,8 @@ class Overview(ListView):
             percent = 0
 
         # list of all existing categories
-        categories = [p['category'] for p in User.objects.values('category')
-            .exclude(category='').distinct()]
+        details = [p['detail'] for p in User.objects.values('detail')
+            .exclude(detail='').distinct()]
 
         # list of all existing committees
         committees = [p['committee'] for p in User.objects.values('committee')
@@ -127,7 +127,7 @@ class Overview(ListView):
         context.update({
             'allusers': all_users,
             'percent': round(percent, 1),
-            'categories': categories,
+            'details': details,
             'committees': committees,
             'cookie': ['participant_sortfilter', urlencode(decodedict(self.sortfilter),
                 doseq=True)],
@@ -223,7 +223,7 @@ class ParticipantsListPDF(PDFView):
                 counter,
                 Paragraph(user.last_name, stylesheet['Tablecell']),
                 Paragraph(user.first_name, stylesheet['Tablecell']),
-                Paragraph(user.category, stylesheet['Tablecell']),
+                Paragraph(user.detail, stylesheet['Tablecell']),
                 Paragraph(user.type, stylesheet['Tablecell']),
                 Paragraph(user.committee, stylesheet['Tablecell'])])
         t = LongTable(data, style=[