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diff --git a/docs/_templates/copyright.html b/docs/_templates/copyright.html
index 16368b510..5c3e7f551 100644
--- a/docs/_templates/copyright.html
+++ b/docs/_templates/copyright.html
@@ -1,5 +1,5 @@
 <div>
-	&copy; 2023, <a href=contents/atom/who.html>Liliana M. Moreno Vargas, Diego Prada Gracia
+	&copy; 2023, <a href=contents/about/who.html>Liliana M. Moreno Vargas, Diego Prada Gracia
 		and contributors</a> | <a href="https://www.uibcdf.org/">UIBCDF Lab</a> 
 	at the <a href="http://himfg.com.mx">Children's Hospital of Mexico Federico Gómez</a><br />
 	<a href="https://github.com/uibcdf/MolSysMT">MolSysMT is an open source project</a> shared
diff --git a/docs/contents/about/what.md b/docs/contents/about/what.md
index 8705e6d4b..6bf2c24d7 100644
--- a/docs/contents/about/what.md
+++ b/docs/contents/about/what.md
@@ -1,5 +1,55 @@
 # What is MolSysMT?
 
-To be written soon.
+MolSysMT -**Mol**ecular **Sys**tems **M**ulti **T**oolkit - is a scientific
+open-source Python library designed to facilitate work with molecular models
+and simulations.
 
+This library was developed to provide a user-friendly interface for
+computational molecular biology labs, such as the
+[UIBCDF](https://www.uibcdf.org/), to use in their research. With MolSysMT, you
+can streamline the integration of workflows involving molecular models and
+molecular dynamics trajectories.
+
+While most of the functions and methods in MolSysMT were purposefully developed
+and in-house programmed, the inclusion of native objects and functions was not its
+primary goal, nor is it the strongest reason to use it. The main strength of
+MolSysMT lies in its flexibility and adaptability, making it a valuable tool
+for supporting workflows with molecular models and simulations. MolSysMT was
+not designed to replicate the capabilities of other tools that may excel in
+specific areas. Instead, it was conceived as an easy-to-use tool for
+coordinating and integrating the use of libraries such as MDAnalysis, MDTraj,
+PDBFixer, OpenMM, ParmED, HTMD, RDKit, or NGLView, among other extremely useful
+libraries. Whenever you use methods or tools from these packages, all credit
+should be given to their respective authors, developers, maintainers, and
+contributors.
+
+MolSysMT is an open-source project shared under the MIT license. This means
+that you have the right to use, copy, modify, merge, publish, distribute,
+sublicense, and/or sell copies without any limitations.
+
+If you have suggestions, improvements, enhancement proposals, if you miss a
+functionality, or you have identified a bug or a malfunction, feel free to
+contribute to its development or interact with the authors and contributors by
+using the [MolSysMT public GitHub repository](https://github.com/uibcdf/MolSysMT).
+
+When using MolSysMT, it is important to understand that the authors and
+contributors do not provide any legal warranty or assume any liability of any
+kind regarding its use and results.
+
+We hope you find it useful!
+
+The authors.
+
+<br/>
+
+<br/>
+
+:::{figure} ../../_static/logo.svg
+:width: 50%
+:align: center
+:::
+
+<br/>
+
+<br/>
 
diff --git a/docs/contents/about/who.md b/docs/contents/about/who.md
index 76361c9db..74061c1a3 100644
--- a/docs/contents/about/who.md
+++ b/docs/contents/about/who.md
@@ -1,4 +1,40 @@
 # Who is behind?
 
-Breve descripción de los responsables y contribuyentes.
+MolSysMT is a project conceived and developed by the members of
+the [Computational Biology and Drug Design Research Unit
+(UIBCDF)](https://www.uibcdf.org/) at the [Mexican National Institute of Health
+- Children's Hospital of Mexico Federico Gómez](http://www.himfg.edu.mx/).
 
+## Authors
+
+- [Liliana M. Moreno Vargas](https://www.uibcdf.org/)
+- [Diego Prada Gracia](https://www.uibcdf.org/)
+
+## Contributors
+
+- [Daniel Ibarrola Sánchez](https://github.com/Daniel-Ibarrola)
+
+</br>
+
+</br>
+
+</br>
+
+::::{grid} 2
+:::{grid-item}
+```{image} ../../_static/LogoUIBCDF_vertical.png
+:height: 180px
+:align: center
+```
+:::
+:::{grid-item}
+```{image} ../../_static/LogotipoIxtlilton.png
+:height: 180px
+:align: center
+```
+:::
+::::
+
+</br>
+
+</br>