diff --git a/academic/laghos/README b/academic/laghos/README
new file mode 100644
index 0000000000..655cace20f
--- /dev/null
+++ b/academic/laghos/README
@@ -0,0 +1,4 @@
+  Laghos (LAGrangian High-Order Solver) is a miniapp that solves the
+time-dependent Euler equations of compressible gas dynamics in a
+moving Lagrangian frame using unstructured high-order finite element
+spatial discretization and explicit high-order time-stepping.
diff --git a/academic/laghos/laghos.SlackBuild b/academic/laghos/laghos.SlackBuild
new file mode 100644
index 0000000000..c0ddd9ffc5
--- /dev/null
+++ b/academic/laghos/laghos.SlackBuild
@@ -0,0 +1,123 @@
+#!/bin/bash
+
+# Slackware build script for Laghos
+
+# Copyright 2022 William PC - Seattle, USA
+# All rights reserved.
+#
+# Redistribution and use of this script, with or without modification, is
+# permitted provided that the following conditions are met:
+#
+# 1. Redistributions of this script must retain the above copyright
+#    notice, this list of conditions and the following disclaimer.
+#
+#  THIS SOFTWARE IS PROVIDED BY THE AUTHOR "AS IS" AND ANY EXPRESS OR IMPLIED
+#  WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+#  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO
+#  EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+#  SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+#  PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
+#  OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+#  WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
+#  OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
+#  ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+cd $(dirname $0) ; CWD=$(pwd)
+
+PRGNAM=laghos
+VERSION=${VERSION:-3.1}
+BUILD=${BUILD:-1}
+TAG=${TAG:-_SBo}
+PKGTYPE=${PKGTYPE:-tgz}
+
+SRCNAM=Laghos
+
+if [ -z "$ARCH" ]; then
+  case "$( uname -m )" in
+    i?86) ARCH=i586 ;;
+    arm*) ARCH=arm ;;
+       *) ARCH=$( uname -m ) ;;
+  esac
+fi
+
+# If the variable PRINT_PACKAGE_NAME is set, then this script will report what
+# the name of the created package would be, and then exit. This information
+# could be useful to other scripts.
+if [ ! -z "${PRINT_PACKAGE_NAME}" ]; then
+  echo "$PRGNAM-$VERSION-$ARCH-$BUILD$TAG.$PKGTYPE"
+  exit 0
+fi
+
+TMP=${TMP:-/tmp/SBo}
+PKG=$TMP/package-$PRGNAM
+OUTPUT=${OUTPUT:-/tmp}
+
+if [ "$ARCH" = "i586" ]; then
+  SLKCFLAGS="-O2 -march=i586 -mtune=i686"
+  LIBDIRSUFFIX=""
+elif [ "$ARCH" = "i686" ]; then
+  SLKCFLAGS="-O2 -march=i686 -mtune=i686"
+  LIBDIRSUFFIX=""
+elif [ "$ARCH" = "x86_64" ]; then
+  SLKCFLAGS="-O2 -fPIC"
+  LIBDIRSUFFIX="64"
+else
+  SLKCFLAGS="-O2"
+  LIBDIRSUFFIX=""
+fi
+
+set -e
+
+rm -rf $PKG
+mkdir -p $TMP $PKG $OUTPUT
+cd $TMP
+rm -rf $SRCNAM-$VERSION
+tar xvf $CWD/$SRCNAM-$VERSION.tar.gz
+cd $SRCNAM-$VERSION
+
+chown -R root:root .
+find -L . \
+ \( -perm 777 -o -perm 775 -o -perm 750 -o -perm 711 -o -perm 555 \
+  -o -perm 511 \) -exec chmod 755 {} \; -o \
+ \( -perm 666 -o -perm 664 -o -perm 640 -o -perm 600 -o -perm 444 \
+  -o -perm 440 -o -perm 400 \) -exec chmod 644 {} \;
+
+
+sed -i 's#config/config.mk#share/mfem-4.5/config.mk#' {.,amr,serial}/makefile
+sed -i 's#config/test.mk#share/mfem-4.5/test.mk#' amr/makefile
+
+# not working keep it or later (do not tell about it at README)
+if [ "${PARALLEL:-no}" == "yes" ]; then
+  make MFEM_DIR=/usr
+else
+  cd serial
+  make MFEM_DIR=/usr
+  make MFEM_DIR=/usr checks
+  cd ..
+fi
+
+install -d $PKG/usr/bin
+install -m 0755 serial/laghos $PKG/usr/bin
+
+install -d $PKG/usr/share/$PRGNAM
+cp -av data $PKG/usr/share/$PRGNAM
+
+
+# Don't ship .la files:
+rm -f $PKG/{,usr/}lib${LIBDIRSUFFIX}/*.la
+
+find $PKG -print0 | xargs -0 file | grep -e "executable" -e "shared object" | grep ELF \
+  | cut -f 1 -d : | xargs strip --strip-unneeded 2> /dev/null || true
+
+find $PKG -depth -type d -empty -delete || true
+
+mkdir -p $PKG/usr/doc/$PRGNAM-$VERSION
+cp -a CHANGELOG LICENSE NOTICE README.md \
+       	$PKG/usr/doc/$PRGNAM-$VERSION
+cat $CWD/$PRGNAM.SlackBuild > $PKG/usr/doc/$PRGNAM-$VERSION/$PRGNAM.SlackBuild
+
+mkdir -p $PKG/install
+cat $CWD/slack-desc > $PKG/install/slack-desc
+
+cd $PKG
+/sbin/makepkg -l y -c n $OUTPUT/$PRGNAM-$VERSION-$ARCH-$BUILD$TAG.$PKGTYPE
diff --git a/academic/laghos/laghos.info b/academic/laghos/laghos.info
new file mode 100644
index 0000000000..e7f2ae8aed
--- /dev/null
+++ b/academic/laghos/laghos.info
@@ -0,0 +1,10 @@
+PRGNAM="laghos"
+VERSION="3.1"
+HOMEPAGE="https://math-atlas.sourceforge.net"
+DOWNLOAD="https://github.com/CEED/Laghos/archive/v3.1/Laghos-3.1.tar.gz"
+MD5SUM="5c2cc3c9fb68985cd9d6fa2c36721f21"
+DOWNLOAD_x86_64=""
+MD5SUM_x86_64=""
+REQUIRES="mfem hypre"
+MAINTAINER="William PC"
+EMAIL="w_calandrini[at]hotmail[dot]com"
diff --git a/academic/laghos/slack-desc b/academic/laghos/slack-desc
new file mode 100644
index 0000000000..c772f12ebf
--- /dev/null
+++ b/academic/laghos/slack-desc
@@ -0,0 +1,19 @@
+# HOW TO EDIT THIS FILE:
+# The "handy ruler" below makes it easier to edit a package description.
+# Line up the first '|' above the ':' following the base package name, and
+# the '|' on the right side marks the last column you can put a character in.
+# You must make exactly 11 lines for the formatting to be correct.  It's also
+# customary to leave one space after the ':' except on otherwise blank lines.
+
+      |-----handy-ruler------------------------------------------------------|
+laghos: laghos (LAGrangian High-Order Solver)
+laghos:
+laghos:
+laghos:   Laghos (LAGrangian High-Order Solver) is a miniapp that solves
+laghos: the time-dependent Euler equations of compressible gas dynamics
+laghos: in a moving Lagrangian frame using unstructured high-order finite
+laghos: element spatial discretization and explicit high-order time-stepping.
+laghos:
+laghos:
+laghos:
+laghos: