.TOP File Extension

TOP files exist as 2 different types. Please find information about each of them below.

Type 1: Gromacs Topology File

The topology file follows the GROMACS specification for a molecular topology. Top files can be generated by pdb2gmx. Tables list all possible topology file entries, units of parameters, interactions t...

General Information

Title TOP File Extension
Extension .top
Full Form Gromacs Topology File
File Type Data File
Developer GROMACS Development Team
MIME Type text/plain

File Function

Primary Function Define molecular topology
Additional Functions Specify force fields, Include molecular parameters

File Characteristics

Text-Based Yes
Human Readable Partially
Editable Yes

Use Cases

Molecular Dynamics Yes
Simulation Preprocessing Yes
Biophysical Research Yes

Security and Practices

Security Risks Minimal
Best Practices Validate syntax, Backup files

Historical/Version Information

Initial Release 1991
Latest Version GROMACS 2023

Associated Types

Similar Extensions .gro, .mdp, .itp

Software Compatibility

Software Usage Policy OS Compatibility
GROMACS Free Windows, Mac, Linux
PyMOL Free, Paid versions Windows, Mac, Linux
VMD Free Windows, Mac, Linux

Type 2: TopSolid Design Document

TopSolid design documents store CAD objects and drawings. They are used by TopSolid software for project management and CAD. They also store 3D shapes from CAD drawings designed in TopSolid or other p...

General Information

Title TOP File Extension
Extension .top
Full Form TopSolid Design Document
File Type CAD File
Developer Missler Software
MIME Type application/octet-stream

File Function

Primary Function Store design data
Additional Functions 3D modeling, 2D drafting
Features Parametric, Associative

File Characteristics

Quality High precision
Supports Layers Yes
Supports Transparency Yes
Editable Yes

Use Cases

Mechanical Design Yes
Product Manufacturing Yes
Tool Making Yes

Security and Practices

Security Risks File corruption
Best Practices Regular backups, access control

Historical/Version Information

Initial Release Not widely published
Latest Version Based on TopSolid version

Associated Types

Similar Extensions .stp, .igs, .dxf

Software Compatibility

Software Usage Policy OS Compatibility
TopSolid Paid Windows