diff --git a/src/common.py b/src/common.py
index 5275a41..964057a 100644
--- a/src/common.py
+++ b/src/common.py
@@ -1,15 +1,17 @@
 from datetime import datetime
 
+
 class Serialize:
     def boolean(string: str) -> bool:
         if string == "true" or string == "True":
             return True
         return False
 
-
     def integer(string: str) -> int:
         return int(string)
 
-
     def time(string: str) -> datetime:
-        return datetime.strptime(string, '%Y-%m-%dT%H:%M:%S.%f%z')
+        try:
+            return datetime.strptime(string, "%Y-%m-%dT%H:%M:%S.%f%z")
+        except TypeError:
+            return string
diff --git a/src/images.py b/src/images.py
index c91faef..4869729 100644
--- a/src/images.py
+++ b/src/images.py
@@ -1,10 +1,13 @@
+import re
 from typing import Self
 from src.common import Serialize
 
+
 class Images:
     """
     Images class object.
     """
+
     def __init__(self, images: list) -> None:
         """
         Initialize an images object.
@@ -12,6 +15,7 @@ class Images:
         self.images = []
 
         self.deserialize(images=images)
+        self.sort_by_time()
 
     def deserialize(self, images: list) -> Self:
         """
@@ -30,11 +34,41 @@ class Images:
             images.append(image.serialize())
         return images
 
+    def filter_by_os(self, os="") -> Self:
+        images = []
+        for image in self.images:
+            if image.os == os:
+                images.append(image.serialize())
+        return Images(images)
+
+    def filter_by_os_version(self, os_version="") -> Self:
+        images = []
+        for image in self.images:
+            if image.os_version == os_version:
+                images.append(image.serialize())
+        return Images(images)
+
+    def filter_by_architecture(self, architecture="") -> Self:
+        images = []
+        for image in self.images:
+            if image.architecture == architecture:
+                images.append(image.serialize())
+        return Images(images)
+
+    def sort_by_time(self) -> Self:
+        self.images.sort(key=lambda image: image.last_pushed, reverse=True)
+        return self
+
+    def get_latest(self) -> Self:
+        self.sort_by_time()
+        return Images([self.serialize()[0]])
+
 
 class Image:
     """
     Image class object.
     """
+
     def __init__(self, image: dict) -> None:
         """
         Initialize an image object.
@@ -42,7 +76,9 @@ class Image:
         self.architecture = "arm"
         self.features = ""
         self.variant = "v7"
-        self.digest = "sha256:2627e55acb9ac183f1c94e6a44f869620d164bbb10d7c42b29df08513eb20c29"
+        self.digest = (
+            "sha256:2627e55acb9ac183f1c94e6a44f869620d164bbb10d7c42b29df08513eb20c29"
+        )
         self.os = "linux"
         self.os_features = ""
         self.os_version = None
@@ -57,17 +93,17 @@ class Image:
         """
         Method to deserialize image dictionary.
         """
-        self.architecture = image.get('architecture', None)
-        self.features = image.get('features', None)
-        self.variant = image.get('variant', None)
-        self.digest = image.get('digest', None)
-        self.os = image.get('os', None)
-        self.os_features = image.get('os_features', None)
-        self.os_version = image.get('os_version', None)
-        self.size = Serialize.integer(image.get('size', -1))
-        self.status = image.get('status', None)
-        self.last_pulled = Serialize.time(image.get('last_pulled', None))
-        self.last_pushed = Serialize.time(image.get('last_pushed', None))
+        self.architecture = image.get("architecture", None)
+        self.features = image.get("features", None)
+        self.variant = image.get("variant", None)
+        self.digest = image.get("digest", None)
+        self.os = image.get("os", None)
+        self.os_features = image.get("os_features", None)
+        self.os_version = image.get("os_version", None)
+        self.size = Serialize.integer(image.get("size", -1))
+        self.status = image.get("status", None)
+        self.last_pulled = Serialize.time(image.get("last_pulled", None))
+        self.last_pushed = Serialize.time(image.get("last_pushed", None))
 
         return self
 
diff --git a/src/main.py b/src/main.py
index 0021173..d6ff3e0 100644
--- a/src/main.py
+++ b/src/main.py
@@ -8,8 +8,12 @@ password = None
 
 def main():
     reg = Registry(username=username, password=password)
-    registry = reg.populate_tags("traefik", namespace="rapidfort", url_params="page_size=25")
-    print(registry.tags.serialize())
+    registry = reg.populate_tags(image="alpine", url_params="page_size=25")
+
+    latest = registry.tags.filter_by_os(os="linux").filter_by_architecture(architecture="arm").get_latest().serialize()
+    digest = latest[0]['images'][0]['digest']
+    digest_algorithm, digest_hash = digest.split(":")
+    print(digest_hash)
 
 if __name__ == "__main__":
     main()
diff --git a/src/registry.py b/src/registry.py
index d31b607..9f48e19 100644
--- a/src/registry.py
+++ b/src/registry.py
@@ -2,25 +2,29 @@ from typing import Self
 from src.upstream import Upstream
 from src.tags import Tags
 
+
 class Registry(Upstream):
     """
     Registry class
 
     Keeps track of the image tags pulled from Upstream
     """
+
     def __init__(
-            self,
-            url: str = "https://hub.docker.com",
-            username: str = None,
-            password: str = None,
-        ) -> None:
+        self,
+        url: str = "https://hub.docker.com",
+        username: str = None,
+        password: str = None,
+    ) -> None:
         """
         Initialization method.
         """
         self.tags = None
         Upstream.__init__(self, url=url, username=username, password=password)
 
-    def populate_tags(self, image: str, namespace: str = None, url_params: str = None) -> Self:
+    def populate_tags(
+        self, image: str, namespace: str = "library", url_params: str = None
+    ) -> Self:
         tags = self.get_tags(image=image, namespace=namespace, url_params=url_params)
         self.tags = Tags(tags)
 
diff --git a/src/tags.py b/src/tags.py
index 20e6163..17afbb7 100644
--- a/src/tags.py
+++ b/src/tags.py
@@ -1,11 +1,14 @@
 from typing import Self
+from copy import deepcopy
 from src.images import Images
 from src.common import Serialize
 
+
 class Tags:
     """
     Tags class object.
     """
+
     def __init__(self, tags: list) -> None:
         """
         Initialize a tag object.
@@ -31,10 +34,43 @@ class Tags:
             tags.append(tag.serialize())
         return tags
 
+    def filter_by_os(self, os="") -> Self:
+        # TODO: Abstract filter functions
+        tags = []
+        for tag in self.tags:
+            tags.append(tag.filter_by_os(os=os).serialize())
+        return Tags(tags)
+
+    def filter_by_os_version(self, os_version="") -> Self:
+        tags = []
+        for tag in self.tags:
+            tags.append(tag.filter_by_os_version(os_version=os_version).serialize())
+        return Tags(tags)
+
+    def filter_by_architecture(self, architecture="") -> Self:
+        tags = []
+        for tag in self.tags:
+            tags.append(tag.filter_by_architecture(architecture=architecture).serialize())
+        return Tags(tags)
+
+    def sort_by_image_time(self) -> Self:
+        self.tags.sort(key=lambda tag: tag.images.serialize()[0]['last_pushed'], reverse=True)
+        return self
+
+    def get_latest(self) -> Self:
+        tags = deepcopy(self)
+        for tag in tags.tags:
+            tag.images = tag.images.get_latest()
+        tags.sort_by_image_time()
+        tags.tags = [tags.tags[0]]
+        return tags
+
+
 class Tag:
     """
     Tag class object.
     """
+
     def __init__(self, tag: dict) -> None:
         """
         Initialize a tag object.
@@ -62,8 +98,8 @@ class Tag:
         """
         Method to parse tag dictionary.
         """
-        self.creator = Serialize.integer(tag.get('creator', -1))
-        self.id = Serialize.integer(tag.get('id', -1))
+        self.creator = Serialize.integer(tag.get("creator", -1))
+        self.id = Serialize.integer(tag.get("id", -1))
         self.images = Images(tag.get("images", None))
         self.last_updated = Serialize.time(tag.get("last_updated", None))
         self.last_updater = Serialize.integer(tag.get("last_updater", None))
@@ -86,5 +122,20 @@ class Tag:
         Method to serialize tag object.
         """
         tags = self.__dict__
-        tags['images'] = self.images.serialize()
+        tags["images"] = self.images.serialize()
         return tags
+
+    def filter_by_os(self, os="") -> Self:
+        tag = deepcopy(self)
+        tag.images = self.images.filter_by_os(os=os)
+        return tag
+
+    def filter_by_os_version(self, os_version="") -> Self:
+        tag = deepcopy(self)
+        tag.images = self.images.filter_by_os_version(os_version=os_version)
+        return tag
+
+    def filter_by_architecture(self, architecture="") -> Self:
+        tag = deepcopy(self)
+        tag.images = self.images.filter_by_architecture(architecture=architecture)
+        return tag
diff --git a/src/upstream.py b/src/upstream.py
index 6db7a78..e5876c5 100644
--- a/src/upstream.py
+++ b/src/upstream.py
@@ -21,13 +21,18 @@ class Upstream:
         if username and password:
             self.req.get_token(url + "/v2/users/login", username, password)
 
-    def get_tags(self, image, namespace: str = "library", url_params: str = None) -> dict:
+    def get_tags(
+        self, image, namespace: str = "library", url_params: str = None
+    ) -> dict:
         """
         Method which returns the tags page in a dictionary.
         """
         if url_params:
             url = "{registry_url}/v2/namespaces/{namespace}/repositories/{repository}/tags?{url_params}".format(
-                registry_url=self.url, namespace=namespace, repository=image, url_params=url_params
+                registry_url=self.url,
+                namespace=namespace,
+                repository=image,
+                url_params=url_params,
             )
         else:
             url = "{registry_url}/v2/namespaces/{namespace}/repositories/{repository}/tags".format(