diff --git a/src/domain.rs b/src/domain.rs
index b1f6cc1..92bf6ba 100644
--- a/src/domain.rs
+++ b/src/domain.rs
@@ -1,3 +1,4 @@
 pub mod benutzer;
 pub mod gruppe;
 pub mod rolle;
+pub mod typ;
diff --git a/src/domain/typ.rs b/src/domain/typ.rs
new file mode 100644
index 0000000..03fa54a
--- /dev/null
+++ b/src/domain/typ.rs
@@ -0,0 +1,5 @@
+pub mod dataloader;
+pub mod entity;
+pub mod model;
+pub mod repository;
+pub mod service;
diff --git a/src/domain/typ/dataloader.rs b/src/domain/typ/dataloader.rs
new file mode 100644
index 0000000..e69de29
diff --git a/src/domain/typ/entity.rs b/src/domain/typ/entity.rs
new file mode 100644
index 0000000..b77726a
--- /dev/null
+++ b/src/domain/typ/entity.rs
@@ -0,0 +1,2 @@
+pub mod typ;
+pub use typ::Typ;
diff --git a/src/domain/typ/entity/typ.rs b/src/domain/typ/entity/typ.rs
new file mode 100644
index 0000000..89944e5
--- /dev/null
+++ b/src/domain/typ/entity/typ.rs
@@ -0,0 +1,8 @@
+use crate::scalar::{Id, Time};
+
+pub struct Typ {
+    pub id: Id,
+    pub typname: String,
+    pub erstellt_am: Option<Time>,
+    pub geaendert_am: Option<Time>,
+}
diff --git a/src/domain/typ/model.rs b/src/domain/typ/model.rs
new file mode 100644
index 0000000..2bafd50
--- /dev/null
+++ b/src/domain/typ/model.rs
@@ -0,0 +1,9 @@
+mod typ;
+mod typ_erstelle_input;
+mod typ_loeschen_input;
+mod typ_update_input;
+
+pub use typ::Typ;
+pub use typ_erstelle_input::TypErstelleInput;
+pub use typ_loeschen_input::TypLoeschenInput;
+pub use typ_update_input::TypUpdateInput;
diff --git a/src/domain/typ/model/typ.rs b/src/domain/typ/model/typ.rs
new file mode 100644
index 0000000..a0356ba
--- /dev/null
+++ b/src/domain/typ/model/typ.rs
@@ -0,0 +1,22 @@
+use async_graphql::{ComplexObject, SimpleObject};
+
+use crate::scalar::{Id, Time};
+
+#[derive(sqlx::FromRow, SimpleObject, Clone, Debug)]
+#[graphql(complex)]
+pub struct Typ {
+    /// Die UUID einer Typ
+    pub id: Id,
+
+    /// Der Typname
+    pub typname: String,
+
+    /// Wann die Typ erstellt wurde
+    pub erstellt_am: Time,
+
+    /// Wann die Typ geaendert wurde
+    pub geaendert_am: Time,
+}
+
+#[ComplexObject]
+impl Typ {}
diff --git a/src/domain/typ/model/typ_erstelle_input.rs b/src/domain/typ/model/typ_erstelle_input.rs
new file mode 100644
index 0000000..515abc8
--- /dev/null
+++ b/src/domain/typ/model/typ_erstelle_input.rs
@@ -0,0 +1,7 @@
+use async_graphql::InputObject;
+
+#[derive(InputObject)]
+pub struct TypErstelleInput {
+    /// Der Name eines Gerätetyps
+    pub typname: String,
+}
diff --git a/src/domain/typ/model/typ_loeschen_input.rs b/src/domain/typ/model/typ_loeschen_input.rs
new file mode 100644
index 0000000..1caab1f
--- /dev/null
+++ b/src/domain/typ/model/typ_loeschen_input.rs
@@ -0,0 +1,9 @@
+use async_graphql::InputObject;
+
+use crate::scalar::Id;
+
+#[derive(InputObject)]
+pub struct TypLoeschenInput {
+    /// Die ID einer Typ
+    pub id: Id,
+}
diff --git a/src/domain/typ/model/typ_update_input.rs b/src/domain/typ/model/typ_update_input.rs
new file mode 100644
index 0000000..a062125
--- /dev/null
+++ b/src/domain/typ/model/typ_update_input.rs
@@ -0,0 +1,11 @@
+use crate::scalar::Id;
+use async_graphql::InputObject;
+
+#[derive(InputObject)]
+pub struct TypUpdateInput {
+    /// Die ID einer Typ
+    pub id: Id,
+
+    /// Der Name einer Typ
+    pub typname: String,
+}
diff --git a/src/domain/typ/repository.rs b/src/domain/typ/repository.rs
new file mode 100644
index 0000000..f5a110c
--- /dev/null
+++ b/src/domain/typ/repository.rs
@@ -0,0 +1,19 @@
+mod typ_alle;
+mod typ_erstellen;
+mod typ_loeschen;
+mod typ_update;
+
+#[derive(Debug, Clone)]
+pub struct Repository {}
+
+impl Repository {
+    pub fn new() -> Repository {
+        Repository {}
+    }
+}
+
+impl Default for Repository {
+    fn default() -> Self {
+        Self::new()
+    }
+}
diff --git a/src/domain/typ/repository/typ_alle.rs b/src/domain/typ/repository/typ_alle.rs
new file mode 100644
index 0000000..3fb2780
--- /dev/null
+++ b/src/domain/typ/repository/typ_alle.rs
@@ -0,0 +1,16 @@
+use anyhow::Error;
+
+use super::Repository;
+use crate::{database::Queryer, domain::typ::model};
+
+impl Repository {
+    pub async fn typ_alle<'c, C: Queryer<'c>>(&self, db: C) -> Result<Vec<model::Typ>, Error> {
+        const QUERY: &str = r#"
+            SELECT * FROM typen
+        "#;
+
+        let typen = sqlx::query_as::<_, model::Typ>(QUERY).fetch_all(db).await?;
+
+        Ok(typen)
+    }
+}
diff --git a/src/domain/typ/repository/typ_dataloader.rs b/src/domain/typ/repository/typ_dataloader.rs
new file mode 100644
index 0000000..e69de29
diff --git a/src/domain/typ/repository/typ_einen_zeigen.rs b/src/domain/typ/repository/typ_einen_zeigen.rs
new file mode 100644
index 0000000..fe30230
--- /dev/null
+++ b/src/domain/typ/repository/typ_einen_zeigen.rs
@@ -0,0 +1,25 @@
+use anyhow::Error;
+
+use super::Repository;
+use crate::{database::Queryer, domain::typ::model, scalar::Id};
+
+impl Repository {
+    pub async fn typ_zeige_einen<'c, C: Queryer<'c>>(
+        &self,
+        db: C,
+        id: Id,
+    ) -> Result<model::Typ, Error> {
+        const QUERY: &str = r#"
+            SELECT id, erstellt_am, geaendert_am, typname
+            FROM typen
+            WHERE id = $1
+        "#;
+
+        let row = sqlx::query_as::<_, model::Typ>(QUERY)
+            .bind(id)
+            .fetch_one(db)
+            .await?;
+
+        Ok(row)
+    }
+}
diff --git a/src/domain/typ/repository/typ_erstelle_viele.rs b/src/domain/typ/repository/typ_erstelle_viele.rs
new file mode 100644
index 0000000..7c90ee5
--- /dev/null
+++ b/src/domain/typ/repository/typ_erstelle_viele.rs
@@ -0,0 +1,40 @@
+use anyhow::Error;
+
+use super::Repository;
+use crate::database::Queryer;
+use crate::domain::typ::entity;
+use crate::domain::typ::model::{self};
+use crate::scalar::{Id, Time};
+
+impl Repository {
+    pub async fn typ_viele_erstellen<'c, C: Queryer<'c>>(
+        &self,
+        db: C,
+        typen: &[entity::Typ], // input: &[Typ],
+    ) -> Result<Vec<model::Typ>, Error> {
+        let id: Vec<Id> = typen.iter().map(|t| t.id).collect();
+        let typnamen: Vec<String> = typen.iter().map(|t| t.typname.clone()).collect();
+        let erstellt_am: Vec<Option<Time>> = typen.iter().map(|t| t.erstellt_am).collect();
+        let geaendert_am: Vec<Option<Time>> = typen.iter().map(|t| t.geaendert_am).collect();
+
+        const QUERY: &str = r#"
+            INSERT INTO typen (id, typname, erstellt_am, geaendert_am)
+            SELECT * FROM UNNEST(
+                $1::uuid[],
+                $2::text[],
+                $3::TIMESTAMP[],
+                $4::TIMESTAMP[]
+            ) RETURNING id, erstellt_am, geaendert_am, typname;
+        "#;
+
+        let rows = sqlx::query_as::<_, model::Typ>(QUERY)
+            .bind(id)
+            .bind(typnamen)
+            .bind(erstellt_am)
+            .bind(geaendert_am)
+            .fetch_all(db)
+            .await?;
+
+        Ok(rows)
+    }
+}
diff --git a/src/domain/typ/repository/typ_erstellen.rs b/src/domain/typ/repository/typ_erstellen.rs
new file mode 100644
index 0000000..e6f5cb5
--- /dev/null
+++ b/src/domain/typ/repository/typ_erstellen.rs
@@ -0,0 +1,29 @@
+use anyhow::Error;
+
+use super::Repository;
+use crate::database::Queryer;
+use crate::domain::typ::{entity, model};
+
+impl Repository {
+    pub async fn typ_erstellen<'c, C: Queryer<'c>>(
+        &self,
+        db: C,
+        typ: &entity::Typ,
+    ) -> Result<model::Typ, Error> {
+        const QUERY: &str = r#"
+            INSERT INTO typen (id, erstellt_am, geaendert_am, typname) VALUES (
+                $1, $2, $3, $4
+            ) RETURNING id, erstellt_am, geaendert_am, typname;
+        "#;
+
+        let typ = sqlx::query_as::<_, model::Typ>(QUERY)
+            .bind(typ.id)
+            .bind(typ.erstellt_am)
+            .bind(typ.geaendert_am)
+            .bind(&typ.typname)
+            .fetch_one(db)
+            .await?;
+
+        Ok(typ)
+    }
+}
diff --git a/src/domain/typ/repository/typ_loeschen.rs b/src/domain/typ/repository/typ_loeschen.rs
new file mode 100644
index 0000000..3e4895b
--- /dev/null
+++ b/src/domain/typ/repository/typ_loeschen.rs
@@ -0,0 +1,24 @@
+use anyhow::Error;
+
+use super::Repository;
+use crate::database::Queryer;
+use crate::domain::typ::{entity, model};
+
+impl Repository {
+    pub async fn typ_loeschen<'c, C: Queryer<'c>>(
+        &self,
+        db: C,
+        typ: &entity::Typ,
+    ) -> Result<model::Typ, Error> {
+        const QUERY: &str = r#"
+            DELETE FROM typen WHERE id=$1 RETURNING id, erstellt_am, geaendert_am, typname;
+        "#;
+
+        let typ = sqlx::query_as::<_, model::Typ>(QUERY)
+            .bind(typ.id)
+            .fetch_one(db)
+            .await?;
+
+        Ok(typ)
+    }
+}
diff --git a/src/domain/typ/repository/typ_update.rs b/src/domain/typ/repository/typ_update.rs
new file mode 100644
index 0000000..9ffc59e
--- /dev/null
+++ b/src/domain/typ/repository/typ_update.rs
@@ -0,0 +1,28 @@
+use anyhow::Error;
+
+use super::Repository;
+use crate::database::Queryer;
+use crate::domain::typ::{entity, model};
+
+impl Repository {
+    pub async fn typ_update<'c, C: Queryer<'c>>(
+        &self,
+        db: C,
+        typ: &entity::Typ,
+    ) -> Result<model::Typ, Error> {
+        const QUERY: &str = r#"
+            UPDATE typen
+            SET geaendert_am = $2, typname = $3 WHERE id = $1
+            RETURNING id, erstellt_am, geaendert_am, typname;
+        "#;
+
+        let typ = sqlx::query_as::<_, model::Typ>(QUERY)
+            .bind(typ.id)
+            .bind(typ.geaendert_am)
+            .bind(&typ.typname)
+            .fetch_one(db)
+            .await?;
+
+        Ok(typ)
+    }
+}
diff --git a/src/domain/typ/service.rs b/src/domain/typ/service.rs
new file mode 100644
index 0000000..be650e1
--- /dev/null
+++ b/src/domain/typ/service.rs
@@ -0,0 +1,21 @@
+mod typ_alle;
+// mod typ_dataloader;
+mod typ_erstellen;
+mod typ_loeschen;
+mod typ_update;
+
+use super::repository::Repository;
+use crate::database::DB;
+
+#[derive(Debug)]
+pub struct Service {
+    repo: Repository,
+    pub db: DB,
+}
+
+impl Service {
+    pub fn new(db: DB) -> Self {
+        let repo = Repository::new();
+        Self { repo, db }
+    }
+}
diff --git a/src/domain/typ/service/typ_alle.rs b/src/domain/typ/service/typ_alle.rs
new file mode 100644
index 0000000..1a581fa
--- /dev/null
+++ b/src/domain/typ/service/typ_alle.rs
@@ -0,0 +1,12 @@
+use anyhow::Error;
+
+use crate::domain::typ::model;
+
+use super::Service;
+
+impl Service {
+    pub async fn typ_alle(&self) -> Result<Vec<model::Typ>, Error> {
+        let typ = self.repo.typ_alle(&self.db).await?;
+        Ok(typ)
+    }
+}
diff --git a/src/domain/typ/service/typ_dataloader.rs b/src/domain/typ/service/typ_dataloader.rs
new file mode 100644
index 0000000..d11256b
--- /dev/null
+++ b/src/domain/typ/service/typ_dataloader.rs
@@ -0,0 +1,15 @@
+use std::{collections::HashMap, sync::Arc};
+
+use crate::{domain::typ::model::Typ, scalar::Id};
+
+use super::Service;
+
+impl Service {
+    pub async fn typ_dataloader(
+        &self,
+        keys: &[Id],
+    ) -> Result<HashMap<Id, Vec<Typ>>, Arc<sqlx::Error>> {
+        let typen_dataloader = self.repo.typ_dataloader(&self.db, keys).await?;
+        Ok(typen_dataloader)
+    }
+}
diff --git a/src/domain/typ/service/typ_erstellen.rs b/src/domain/typ/service/typ_erstellen.rs
new file mode 100644
index 0000000..f14cb4b
--- /dev/null
+++ b/src/domain/typ/service/typ_erstellen.rs
@@ -0,0 +1,23 @@
+use anyhow::Error;
+use chrono::Utc;
+use ulid::Ulid;
+
+use super::Service;
+use crate::domain::typ::{
+    entity,
+    model::{self, TypErstelleInput},
+};
+
+impl Service {
+    pub async fn typ_erstellen(&self, input: TypErstelleInput) -> Result<model::Typ, Error> {
+        let typ_input = entity::Typ {
+            id: Ulid::new().into(),
+            typname: input.typname,
+            erstellt_am: Some(Utc::now()),
+            geaendert_am: Some(Utc::now()),
+        };
+
+        let typ = self.repo.typ_erstellen(&self.db, &typ_input).await?;
+        Ok(typ)
+    }
+}
diff --git a/src/domain/typ/service/typ_erstellen_viele.rs b/src/domain/typ/service/typ_erstellen_viele.rs
new file mode 100644
index 0000000..d76e833
--- /dev/null
+++ b/src/domain/typ/service/typ_erstellen_viele.rs
@@ -0,0 +1,33 @@
+use anyhow::Error;
+use chrono::Utc;
+use ulid::Ulid;
+
+use super::Service;
+use crate::domain::typ::{
+    entity,
+    model::{self, TypErstelleInput},
+};
+
+impl Service {
+    pub async fn typ_erstellen_viele(
+        &self,
+        input: &[TypErstelleInput],
+    ) -> Result<Vec<model::Typ>, Error> {
+        let typen_input: Vec<entity::Typ> = input
+            .iter()
+            .map(|t| entity::Typ {
+                id: Ulid::new().into(),
+                typname: t.typname.clone(),
+                erstellt_am: Some(Utc::now()),
+                geaendert_am: Some(Utc::now()),
+            })
+            .collect();
+
+        let typen = self
+            .repo
+            .typ_viele_erstellen(&self.db, &typen_input)
+            .await?;
+
+        Ok(typen)
+    }
+}
diff --git a/src/domain/typ/service/typ_loeschen.rs b/src/domain/typ/service/typ_loeschen.rs
new file mode 100644
index 0000000..c4f4c52
--- /dev/null
+++ b/src/domain/typ/service/typ_loeschen.rs
@@ -0,0 +1,22 @@
+use anyhow::Error;
+use chrono::Utc;
+
+use super::Service;
+use crate::domain::typ::{
+    entity,
+    model::{self, TypLoeschenInput},
+};
+
+impl Service {
+    pub async fn typ_loeschen(&self, input: TypLoeschenInput) -> Result<model::Typ, Error> {
+        let typ_input = entity::Typ {
+            id: input.id,
+            typname: String::new(),
+            erstellt_am: None,
+            geaendert_am: Some(Utc::now()),
+        };
+
+        let typ = self.repo.typ_loeschen(&self.db, &typ_input).await?;
+        Ok(typ)
+    }
+}
diff --git a/src/domain/typ/service/typ_update.rs b/src/domain/typ/service/typ_update.rs
new file mode 100644
index 0000000..d7644fb
--- /dev/null
+++ b/src/domain/typ/service/typ_update.rs
@@ -0,0 +1,22 @@
+use anyhow::Error;
+use chrono::Utc;
+
+use super::Service;
+use crate::domain::typ::{
+    entity,
+    model::{self, TypUpdateInput},
+};
+
+impl Service {
+    pub async fn typ_update(&self, input: TypUpdateInput) -> Result<model::Typ, Error> {
+        let typ_input = entity::Typ {
+            id: input.id,
+            typname: input.typname,
+            erstellt_am: None,
+            geaendert_am: Some(Utc::now()),
+        };
+
+        let typ = self.repo.typ_update(&self.db, &typ_input).await?;
+        Ok(typ)
+    }
+}
diff --git a/src/mutations/typ.rs b/src/mutations/typ.rs
index 3659129..57b39a9 100644
--- a/src/mutations/typ.rs
+++ b/src/mutations/typ.rs
@@ -1,7 +1,8 @@
-use crate::{
-    models::typ::{Typ, TypCreateInput, TypUpdateInput},
-    scalar::Id,
+use crate::domain::typ::{
+    model::{Typ, TypErstelleInput, TypLoeschenInput, TypUpdateInput},
+    service::Service,
 };
+
 use async_graphql::{Context, FieldResult};
 use sqlx::postgres::PgPool;
 
@@ -10,31 +11,36 @@ pub struct TypMutation;
 
 #[async_graphql::Object]
 impl TypMutation {
-    async fn create_typ(&self, ctx: &Context<'_>, input: TypCreateInput) -> FieldResult<Typ> {
+    async fn erstelle_typ(&self, ctx: &Context<'_>, input: TypErstelleInput) -> FieldResult<Typ> {
         let pool = ctx.data::<PgPool>()?;
 
-        let row = Typ::create(pool, &input).await?;
-        Ok(row)
+        let typ = Service::new(pool.clone()).typ_erstellen(input).await?;
+        Ok(typ)
     }
 
-    async fn create_many_typen(
+    async fn erstelle_viele_typen(
         &self,
         ctx: &Context<'_>,
-        input: Vec<TypCreateInput>,
+        input: Vec<TypErstelleInput>,
     ) -> FieldResult<Vec<Typ>> {
         let pool = ctx.data::<PgPool>()?;
-        let row = Typ::create_many(pool, &input).await?;
-        Ok(row)
+
+        let gruppe = Service::new(pool.clone())
+            .typ_erstellen_viele(&input)
+            .await?;
+        Ok(gruppe)
     }
 
     async fn update_typ(&self, ctx: &Context<'_>, input: TypUpdateInput) -> FieldResult<Typ> {
         let pool = ctx.data::<PgPool>()?;
-        let row = Typ::update(pool, &input).await?;
-        Ok(row)
+
+        let typ = Service::new(pool.clone()).typ_update(input).await?;
+        Ok(typ)
     }
 
-    async fn delete_typ(&self, ctx: &Context<'_>, id: Id) -> FieldResult<bool> {
+    async fn loesche_typ(&self, ctx: &Context<'_>, input: TypLoeschenInput) -> FieldResult<Typ> {
         let pool = ctx.data::<PgPool>()?;
-        Ok(Typ::delete(pool, &id).await?)
+        let typ = Service::new(pool.clone()).typ_loeschen(input).await?;
+        Ok(typ)
     }
 }
diff --git a/src/queries/typ.rs b/src/queries/typ.rs
index dc129e3..f83701b 100644
--- a/src/queries/typ.rs
+++ b/src/queries/typ.rs
@@ -1,7 +1,7 @@
 use async_graphql::{Context, FieldResult, Object};
 use sqlx::postgres::PgPool;
 
-use crate::{models::typ::Typ, scalar::Id};
+use crate::domain::typ::{model::Typ, service::Service};
 
 #[derive(Default)]
 pub struct TypQuery {}
@@ -10,13 +10,7 @@ pub struct TypQuery {}
 impl TypQuery {
     async fn typen(&self, ctx: &Context<'_>) -> FieldResult<Vec<Typ>> {
         let pool = ctx.data::<PgPool>()?;
-        let rows = Typ::read_all(pool).await?;
-        Ok(rows)
-    }
-
-    async fn typ(&self, ctx: &Context<'_>, id: Id) -> FieldResult<Typ> {
-        let pool = ctx.data::<PgPool>()?;
-        let row = Typ::read_one(pool, &id).await?;
-        Ok(row)
+        let typen = Service::new(pool.clone()).typ_alle().await?;
+        Ok(typen)
     }
 }