The 18th International Conference on Managed Programming Languages & Runtimes (MPLR, formerly ManLang, originally PPPJ) is a premier forum for presenting and discussing novel results in all aspects of managed programming languages and runtime systems, which serve as building blocks for some of the most important computing systems in use, ranging from small-scale (embedded and real-time systems) to large-scale (cloud-computing and big-data platforms) and anything in between (desktop, mobile, IoT, and wearable applications).

This year, MPLR will be held in Münster, Germany, as permitted considering the health and safety concerns. We expect there will be a mix of in-person and remote attendance options for the event.
Topics

The areas of interest include but are not limited to:

## Languages and Compilers

Managed languages (e.g., Java, Scala, JavaScript, Python, Ruby, C#, F#, Clojure, Groovy, Kotlin, R, Smalltalk, Racket, Rust, Go, Lua, MATLAB, Raku, ...)
Portable intermediate representations like Webassembly
Domain-specific languages
Language design
Compilers and interpreters
Type systems and program logics
Language interoperability
Parallelism, distribution, and concurrency

## Virtual Machines

Managed runtime systems (e.g., JVM, Android Runtime (ART), V8, JavaScriptCore, LLVM, .NET CLR, RPython, GraalVM, ...)
VM design and optimization
VMs for mobile and embedded devices
VMs for real-time applications
Memory management and garbage collection
Hardware/software co-design

## Techniques, Tools, and Applications

Static and dynamic program analysis
Testing and debugging
Refactoring
Program understanding
Program synthesis
Security and privacy
Performance analysis and monitoring
Compiler and program verification

If you are unsure whether a particular topic falls within the scope of MPLR'21 or if you have any other questions, please do not hesitate to contact the Program Chair (jeremy dot singer at glasgow dot ac dot uk).
Submission Categories

MPLR accepts four types of submissions:

1. Regular research papers, describing novel contributions involving managed language platforms. Research papers will be evaluated based on their relevance, novelty, technical rigor, and contribution to the state-of-the-art. (Format: up to 12 pages, excluding bibliography and appendix)
2. Work-in-progress research papers, describing hot topics or promising new ideas, with perhaps less maturity than full papers. Work-in-progress papers will be evaluated with an emphasis on novelty and the potential of the new ideas instead of technical rigor and experimental results. (Format: up to 6 pages, excluding bibliography and appendix)
3. Industry and tool papers, presenting technical challenges and solutions for managed language platforms in the context of deployed applications and systems. Industry and tool papers will be evaluated on their relevance, usefulness, and results. Suitability for demonstration and availability will also be considered for tool papers. (Format: up to 6 pages, excluding bibliography and appendix)
4. Posters, which will be evaluated similarly to work-in-progress papers. Posters can accompany any submission as a way to provide additional demonstration and discussion opportunities. (Format: poster and 1-page abstract)

MPLR 2021 submissions must conform to the ACM Policy on Prior Publication and Simultaneous Submissions and to the SIGPLAN Republication Policy.
Author Instructions

Submissions need to use the ACM acmart format with the sigconf style.

If you are using LaTeX, submissions need to use the acmart document class with the sigconf option. For ease of reviewing, please include page numbers in your submission using the LaTeX command \settopmatter{printfolios=true}. The standard settings of a 9 point font size and the Libertine/Biolinum font family are to be kept.

All submissions need to be in PDF format. MPLR uses single-blind reviewing, i.e., author names are generally included in submissions.

Please also ensure that your submission is legible when printed on a black and white printer. In particular, please check that colors remain distinct and font sizes are legible.

Submissions will be via easychair.