Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The Role of Head-Up Display in Computer- Assisted Instruction   We investigated the role of HUDs in CAI. HUDs have been used in various
situations in daily lives by recent downsizing and cost down of the display
devices. CAI is one of the promising applications for HUDs. We have developed
an HUD-based CAI system for effectively presenting instructions of the
equipment in the transportable earth station. This chapter described HUDs in
CAI from a viewpoint of human-computer interaction based on the development
experience.

18
The categories of this paper are: econ
13
The categories of this paper are: quant-ph
8
The categories of this paper are: hep-ex
32
The categories of this paper are: atom-ph
2
The categories of this paper are: math
27
The categories of this paper are: comp-gas
36
The categories of this paper are: cmp-lg
14
The categories of this paper are: math-ph
15
The categories of this paper are: nucl-ex
26
The categories of this paper are: bayes-an
16
The categories of this paper are: stat
31
The categories of this paper are: ao-sci
3
The categories of this paper are: physics
29
The categories of this paper are: funct-an
19
The categories of this paper are: eess
37
The categories of this paper are: supr-con