list only third party packages in Ubuntu 18.04

command-line 18.04 dpkg

I am Creating a project to view and upgrade packages in Ubuntu. Is there any command for list only Third party software?

dpkg --list shows all packages installed in OS.


To list the packages installed from third-party repositories:

ubuntu-security-status --thirdparty

To list the locally installed or obsolete packages missing from any enabled repository:

ubuntu-security-status --unavailable

To further check the specifics, type in:

apt-cache policy <package_name>

Related

Complex towers: $i^{i^{i^{...}}}$
Proving that the matrix exponential map is surjective onto the general linear group
RSA: How Euler's Theorem is used?
Is there an Inverse Gamma $\Gamma^{-1} (z) $ function?
Indefinite Integral of $\sqrt{\sin x}$
For $G$ group and $H$ subgroup of finite index, prove that $N \subset H$ normal subgroup of $G$ of finite index exists
How to accurately calculate the error function $\operatorname{erf}(x)$ with a computer?
Derivation of the polarization identities?
Asymptotics of binomial coefficients and the entropy function
Functions that are their Own nth Derivatives for Real $n$
Is the null set a subset of every set? [duplicate]
Gay Speed Dating Problem