  Leptoquarks extending the Standard Model (SM) are attracting an increasing
attention in the recent literature. Hence, the identification of 4D SM-like
models and the classification of allowed leptoquarks from strings is an
important step in the study of string phenomenology. We perform the most
extensive search for SM-like models from the non-supersymmetric heterotic
string $\mathrm{SO}(16)\times\mathrm{SO}(16)$, resulting in more than 170,000
inequivalent promising string models from 138 Abelian toroidal orbifolds. We
explore the 4D massless particle spectra of these models in order to identify
all exotics beside the three generations of quarks and leptons. Hereby, we
learn which leptoquark can be realized in this string setup. Moreover, we
analyze the number of SM Higgs doublets which is generically larger than one.
Then, we identify SM-like models with a minimal particle content. These
so-called "almost SM" models appear most frequently in the orbifold geometries
$\mathbb Z_2\times\mathbb Z_4$ (2,4) and (1,6). Finally, we apply machine
learning to our dataset in order to predict the orbifold geometry where a given
particle spectrum can be found most likely.
