Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A survey of food recommenders   Everyone eats. However, people do not always know what to eat. They need a
little help and inspiration. Consequently, a number of apps, services, and
programs have developed recommenders around food. These cover food, meal,
recipe, and restaurant recommendations, which are the most common use cases,
but also other areas such as substitute ingredients, menus, and diets. The
latter is especially important in the area of health and wellness where users
have more specific dietary needs and goals.
  In this survey, we review the food recommender literature. We cover the types
of systems in terms of their goals and what they are recommending, the datasets
and signals that they use to train models, the technical approaches and model
types used, as well as some of the system constraints.

35
The categories of this paper are: mtrl-th
25
The categories of this paper are: patt-sol
13
The categories of this paper are: quant-ph
6
The categories of this paper are: astro-ph
17
The categories of this paper are: q-fin
14
The categories of this paper are: math-ph
3
The categories of this paper are: physics
0
The categories of this paper are: hep-ph
7
The categories of this paper are: hep-th
34
The categories of this paper are: chem-ph
11
The categories of this paper are: hep-lat
21
The categories of this paper are: adap-org
10
The categories of this paper are: q-bio
28
The categories of this paper are: alg-geom
36
The categories of this paper are: cmp-lg
27
The categories of this paper are: comp-gas